Obviously, you can choose to use the Metro to get around D.C., carefully mapping out your route to the sites you want to see, but the Monuments by Moonlight Tour is a great choice for a change of pace.

There is so much to see here beyond the walled old city. Visit Dubrovnik on a Viking Ocean cruise and a choice of well-planned tours is included with your cruise fare.

You can always use your iPhone to guide you around this maze of a city, but only a guide can show you the hidden treasures in Venice. The Roman Guy tour company offers several Venice tours, some with gondola rides included.

You can't see it all in Athens, but choose well-guided group or private tours and you can cover far more ground than you could on your own. Try ShoreTrips whether you arrive by cruise ship or not.

Whether you want a detailed look around the Pike Place Market or the stuff you'd never find in a history book, start with Seattle Free Walking Tours.

Want to see it all in Vancouver, including the Capilano Suspension Bridge? Try this tour put together by West Coast Sightseeing. Then prepare for the suspense.

Walk on the wild side with a tour of Vallarta's street tacos with Puerto Vallarta Food Tours. This is definitely one where it's best to rely on the experts.

Galveston has a ghostly past; from the Civil War to the deadly hurricane of 1900, there are haunting sites to tour. Book with Ghost Tours of Galveston Island to bump up your blood pressure a bit on your next visit to the Texas coast.

As San Juan and all of Puerto Rico rebuilds, guided tours are the best way visit the island at the moment. Bespoke Lifestyle Management tours get you where you want to go and helps you determine what is open and what is not, including the rainforest and bio luminescent bays.

When watersports are on your agenda in Nassau, it is best to stick with experts. Stuart Cove's can pick you up at your hotel or cruise ship and take you snorkeling or diving-even with sharks.

There are cities where safety alone may make it a good idea to have a tour guide. This would be one of those places. See the canal or visit Soberania National Park with expert guides from ShoreTrips.

If you want to do more than visit the Belize Zoo, hire a local guide. From Mayan ruins to river safaris, look at Tours by Locals for options.

Chicago might be a fun place to try the new Tourme app that connects travelers with private guides, like cross between a dating app and a ride share. Each guide posts their rates and what they offer. You make the choice.

Tokyo is another one of those destinations that make you wish you had way more time to explore. Make the most of the visit by deciding what you want to see and experience, then hire a guide or find a tour to get you there. TravelPulse has a list to get you started.

Looking to take in the German scenery by bicycle? Get Your Guide offers a three-hour tour that includes the trendy Sachsenhausen among its wide-ranging list of available tours.

You don't want to waste a minute of your Alaskan cruise. The best way to avoid that is to choose carefully from the array of tours offered by your cruise ship or third-party operators. ShoreTrips has everything from helicopters to dog sleds to make the experience perfect.

Where do you even begin to decide what to experience in Kuala Lumpur? Gardens, temples, and wildlife top most people's lists, but don't forget caves, shopping, plus food and wine tours. Get started at Tours by Locals or check these new adventure tours in Malaysia.

Ooh, Paris! First there's the Louvre, then there's the Eifel Tower, but then what? You're going to need a guide to get you in and out of the top attractions without waiting in lines and without getting stuck in traffic. Luckily, The Paris Guy just launched three tours of favorites-the Louvre, the Catacombs, and the Palace of Versailles.

This is another spot where visiting by cruise may be the easiest way to go. Amawaterways has spring trips that take you to Antwerp where you can enjoy walking or bike tours included in the cruise fare.

You can walk the steep streets of Grenada or hop in the crazy public vans to get to most places, but to get the full experience of chocolate and spices this island is known for, you're going to need a tour guide. Start with ShoreTrips for chocolate or maybe snorkeling tours.

Traveling in Istanbul is not what it used to be. You need a trusted guide to safely experience the markets and mosques here. Viator has a long list of tours, including day-trips outside the city to Cappadocia and Ephesus.

Speaking of Ephesus, visiting by cruise ship is an easy way to get there. Silversea has luxury cruises that include stops at Kusadasi, with tours to these amazing ruins. And be sure to include the Terrace Houses in your tour-they are amazing.

Food, drink, and history are top-of-mind for most visitors to the largest Vietnamese city. But the problem of where to begin your explorations is real. Turn to Urban Adventures for a selection of tours that put you in the center of your dream trip.

Tequila, beer and boat tours await you on the sunny west coast of Mexico, not to mention scuba diving, snorkeling and whale watching. Check out the tours offered by Johann and Sandra at Mazatl¨¢n Tours.

A good tour guide here leads you through Hungary's occupations and revolutions and shows you the art, history and architecture of Budapest. Cruises on the Danube often begin and end in here with culturally rich tours of the city. Take a look at Viking River Cruises for a good selection of options.

Food, wine and amazing architecture are the reasons you need an expert guide here. Start with ShoreTrips' excellent selection.

Much of Lisbon's charm lies off the beaten path. A good guide can get you there, showing you the secrets and flavors of Portugal along the way. Try With Locals for a variety of options.

We don't always think about getting a guide in Las Vegas, but there are some tours worth trying for unique experiences in Sin City. Lip Smacking Foodie Tours are a great way to sample the variety of cuisines Las Vegas offers.

To fully experience everything Coastal Maine offers, you are going to need to rely on guides-from sailing to kayaking to river rafting Acadia Magic has options to pick from.

There is so much to explore beneath the sea surrounding Curacao's shores. If diving here is your dream, The Dive Bus is the best option. The buses haul you and your gear to some of the best shore diving locations on the island and the bonus is that these spots are often some of the best beaches as well.

Though all travel comes with a certain amount of risk, travel in Colombia comes with a slightly elevated level of risk. Tours are the best option for exploring here. Princess, NCL and Holland America all have cruises this year that include Cartagena with optional tours.

Guatemala is another country with slightly higher security issues for tourists. Play it safe with trusted tours and guides. Antigua Tours, Travel, and Hotels by Elizabeth Bell is a great place to start your adventure.

After traveling all the way to New Zealand, you don't want to miss out on any of the amazing experiences there. Look at Canterbury Trails, offering everything from wine tours to multi-day trips encompassing both the North and South Islands.

The problem with St. Lucia is that the mountains that make this island so scenic also make it difficult to explore on your own. Get a guide or book a tour to go ziplining, scuba diving, or volcanic mud bathing. An interesting way to locate a tour here is through Marriott Moments-you can even earn Reward Points or Starpoints.

Getting around Russia's "Venice of the North" can be a challenge. Here again, it's easy to turn to Marriott Moments for a good selection of tours, especially if you are a Marriott Rewards Points member.

This tiny island nation packs a lot into a small footprint. The best options here are with local guides that will help you experience everything you hope to. Start at With Locals to see the options.

To see all that Brazil has to offer, consider a complete guided, packaged tour. Turn to Collette for their expertise in getting you there and helping you experience everything from Brazilian foodie delights to the stunning Iguazu Falls.

If you are going to Guayaquil, chances are that you are headed to the Galapagos, where you will rely on experts to make your trip perfect. Why not make your stopover in Ecuador a part of the exploration? Learn about chocolate or kayak the mangroves with Tours by Locals.

You can probably get yourself to the Riverwalk and the Alamo and probably to Sea World and Fiesta Texas. The real question is whether you can find the amazing food San Antonio is known for. Try SA Food Tours for that.

As with most ancient cities, you can walk the highlights on your own, or you can get the back story as told by people who love sharing their culture with you. The Roman Guy has tours that let you skip the lines plus VIP tours without the hordes of other tourists.

You don't really want to visit the oldest city in the U.S. without a guide, do you? Pick a local tour from the folks who know best at Visit St. Augustine. Choose from ghosts to pirates and everything in between.

Bonaire is all about watersports. Scuba diving, snorkeling, and kite surfing top the list. If your stay on the island is short, get your diving fix with VIP Diving. For everything else, check out Tourme for options from locals.

In Memphis you want music, entertainment and food. Backbeat Tours should be able to cover it all either on foot, by bus or by bike.

There are ghosts here and you might miss them if you attempt to explore on your own. Hire the pros at Ghost City Tours to lead the way.

You want to see the bay, the bridge, Alcatraz and more. It's tough to squeeze it all in without help. Luckily there's Free Tours by Foot with tours of the bridge, Fisherman's Warf, Chinatown, and more.

You want craft beer and distilleries in Denver? Get all the details about self-guided and guided tours from Denver.org. Cheers!

From beer to history, there is a lot to cover in Berlin. See more and experience more with a local guide. Get started at With Locals.

The Roman Guy is your guy for tours in and around Vatican City. You can skip the line and see the Sistine Chapel as well as the other masterpieces within the city. For a real treat try a foodie tour in the Vatican neighborhood.

The Amalfi Coast of Italy is filled with history and stunning scenery. Sure, you could rent a car and a boat and plan it all out. Or you could let Shoretrips worry about the details of getting you to Pompeii and Capri while showing you the highlights.

Do you have a clue where to get the best sunset selfie on Santorini? And you do realize that it's a long hilly walk between the cliffside towns of Oia and Thira, right? If you want to see everything on one of the world's most scenic islands, get started with a tour guide. Santorini Experts tours cover culinary, photography, and trips across the caldera to Thirassia.