19 days in United States Itinerary

Aptly nicknamed the "Mile-High City," Denver sits at an altitude of 1,600 m (5,280 ft) above sea level, located right where the Great Plains give way to the Rocky Mountains.

Appreciate the collections at Denver Botanic Gardens and Denver Art Museum. Head to Pearl Street Mall and Bags by Cab Yarn Shoppefor plenty of shopping. Change things up with a short trip to River Rafting & Tubing in Idaho Springs (about 38 minutes away). And it doesn't end there: meet the residents at Denver Zoo, see the sky in a new way at Denver Museum of Nature & Science, steep yourself in history at Union Station, and get a sense of history and politics at Colorado State Capitol.

To see other places to visit, ratings, and more tourist information, refer to the Denver trip itinerary maker app .

Use the Route module to see travel options from your home to Denver. In May in Denver, expect temperatures between 66°F during the day and 43°F at night. Cap off your sightseeing on the 18th (Sat) early enough to travel to New York City.

Writer Pearl Buck once called New York City “a place apart,” and this giant urban center remains unlike any other in the world.

Satisfy your inner culture vulture at Fifth Avenue and The Metropolitan Museum of Art. For shopping fun, head to Shopping Girlfriend NYC or Kee's Chocolates. Go for a jaunt from New York City to Bronx to see Bronx Zoo about 36 minutes away. The adventure continues: appreciate the history behind 9/11 Memorial, admire nature's wide array of creatures at Central Park Zoo, enjoy breathtaking views from Empire State Building, and go for a walk through Central Park.

To see maps, other places to visit, photos, and tourist information, refer to the New York City trip builder .

Fly from Denver to New York City in 7 hours. Alternatively, you can do a combination of flight and bus; or drive. The time zone difference when traveling from Denver to New York City is 2 hours. Traveling from Denver in May, plan for somewhat warmer nights in New York City, with lows around 55°F. Finish your sightseeing early on the 24th (Fri) so you can travel to Washington DC.

The capital of the United States, the District of Columbia contains the lion's share of the country's most treasured monuments, memorials, and public museums.

Escape the urban bustle at Tidal Basin and Mount Vernon Trail. Your cultural itinerary includes sights like National Air and Space Museum and The National Archives Museum. The adventure continues: admire nature's wide array of creatures at National Zoological Park, admire the masterpieces at National Portrait Gallery, get a new perspective on nature at Smithsonian National Museum of Natural History, and see the interesting displays at United States Holocaust Memorial Museum.

For more things to do, ratings, reviews, and tourist information, use the Washington DC online visit planner .

Getting from New York City to Washington DC by flight takes about 3.5 hours. Other options: take a train; or drive. Traveling from New York City in May, expect nights in Washington DC to be about the same, around 58°F, while days are a bit warmer, around 76°F. Wrap up your sightseeing on the 27th (Mon) to allow time to travel to Los Angeles.

Surrounded by mountain ranges, forests, valleys, beaches, and deserts, the metropolitan area of Los Angeles is home to over 17 million people.

Hammer Museum and Montana Avenue are good opportunities to explore the local culture. Get outdoors at Topanga State Park and Santa Monica State Beach. Step out of Los Angeles to go to Santa Monica and see Third Street Promenade, which is approximately 30 minutes away. The adventure continues: enjoy the sand and surf at Venice Beach and Boardwalk, see the sky in a new way at Griffith Observatory, view the masterpieces at Annenberg Space for Photography, and explore the world behind art at Diorama-museum of Bhagavad-gita.

To see reviews, traveler tips, photos, and other tourist information, read Los Angeles tour itinerary planner.

Fly from Washington DC to Los Angeles in 8 hours. Alternatively, you can do a combination of train and flight; or drive. You'll gain 3 hours traveling from Washington DC to Los Angeles due to the time zone difference. In May, plan for daily highs up to 75°F, and evening lows to 59°F. Finish your sightseeing early on the 31st (Fri) to allow enough time to travel to Madison.

Madison might be the capital of Wisconsin, but students rather than politicians give the city its identity.

Mr Marvel's Wondertorium and House on the Rock will appeal to museum buffs. Get some cultural insight at Brewery Pottery and National Mustard Museum. Explore Madison's surroundings by going to Devil's Lake State Park (in Baraboo), Zipline (in Wisconsin Dells) and Taliesin Preservation: Frank Lloyd Wright Visitor Center (in Spring Green). There's lots more to do: look for all kinds of wild species at Pheasant Branch Creek Conservancy, get a sense of history and politics at Wisconsin State Capitol, and shop like a local with State Street & Downtown Madison.

To find ratings, other places to visit, more things to do, and more tourist information, read our Madison trip itinerary tool .

Do a combination of flight and bus from Los Angeles to Madison in 8 hours. Alternatively, you can fly; or drive. You'll lose 2 hours traveling from Los Angeles to Madison due to the time zone difference. In June in Madison, expect temperatures between 79°F during the day and 58°F at night. Wrap up your sightseeing on the 3rd (Mon) to allow time to travel back home.