Vieques, Puerto Rico

Another option in the Caribbean is Vieques, a small island that lies about 8 miles east of Puerto Rico. Along with the Puerto Rican mainland, it is a United States commonwealth with a strong Spanish influence.

Culebra, Puerto Rico

Culebra, another island municipality of Puerto Rico, offers some of the Caribbean's most serene beaches.

San Juan, Puerto Rico

Not to be overshadowed by its islands, Puerto Rico's capital, San Juan, is steeped in Spanish heritage and culture without sacrificing waterfront sunsets.

Whistler, British Columbia

Have your sights set on a Canadian ski vacation? You can hit the slopes of Whistler Blackcomb, but not without restrictions. First, you'll need to travel by land, and second, you'll need either a passport card or NEXUS, a trusted traveler program. These travel documents were created in conjunction with changes to the Western Hemisphere Travel Initiative that took effect in 2009. 

Quebec City, Canada

It might not be Paris, but French-speaking Quebec City offers a UNESCO World Heritage-designated historic center and a distinctly European vibe. Be sure to review the Canadian travel policies.

Toronto, Canada

Toronto is just across the border from Michigan and New York, and offers all of the excitement of a major U.S. city. Before traveling check out Canada's travel requirements to ensure a trouble-free border crossing.

Cape Breton Island, Canada

Located at the eastern tip of Nova Scotia, a manageable road trip from Maine, Cape Breton Island isn’t just known for the Cape Breton Trail and seafood. It’s also one of the best spots in North America to experience Scottish culture. Prior to your trip, be sure you have all the proper documentation.

Alaska

With its diverse terrain and stunning natural beauty, Alaska is definitely a state to not be overlooked. Obviously you don’t have to worry about a passport if you’re flying to Alaska, but if you’re driving through Canada, you will need a passport card or NEXUS.

San Juan Islands, Washington

Although technically part of Washington State, the San Juan Islands (consisting of San Juan Island, Orcas Island and Lopez Island) feel like another world since they require a ferry ride to reach them.

Key West, Florida

Who says you can't find an island paradise in the continental U.S.? Just off the coast of Florida, Key West is the southernmost city in the country and unlike anywhere else.

Mexico

It's possible to drive or cruise to Mexico with either an enhanced driver’s license or passport card, although an entry permit is required if you’re driving more than 15 miles past the border — necessitating a passport. But cruisers can get away with an original birth certificate and government-issued photo ID.

Bermuda

One loophole to enjoy a passport-protected island is via a closed-loop cruise. Since these start and end in the U.S., all that's required is a birth certificate and government-issued photo ID. The British territory of Bermuda is among the destinations that you can visit, and enjoy a proper afternoon tea too.

Curacao

Part of the ABC island chain in the Caribbean, Curacao will get you pretty close to South America sans passport, thanks to a closed-loop cruise. The Dutch-owned territory allows you to experience not just Dutch culture, but a melting pot of Asian, French, Creole and more.

Belize

The Central American country of Belize is another viable option on a closed-loop cruise, and since Belize resides in the Caribbean, it’s a popular port stop that gives you a quick taste of Mayan ruins and rainforest adventures.

Guam

Guam is the westernmost U.S. territory, and while it's known for its military base, Guam is also one of the leading tourist destinations in the Western Pacific. This tropical paradise features beach clubs, luxurious accommodations and world-class golf courses.

Hawaii

Of course, if you want to be on an exotic island far, far away, your first thought should be of Hawaii and the islands of Kauai, Oahu, Molokai, Lanai and Maui.

American Samoa

You can also experience the heart of Polynesia and Samoan culture in the five volcanic islands that make up the territory of American Samoa.

Swains Island, American Samoa

If you're feeling adventurous, travel to Swains Island in American Samoa, one of the territory's two atolls (coral islands) halfway between Hawaii and New Zealand.

Saipan, Northern Mariana Islands

Your last option for a tropical vacation without a passport is Saipan, one of the 14 lush Northern Mariana Islands, a U.S. commonwealth. The Micronesian paradise has been called "America's best-kept secret."