16. Colorado River, Arizona.

For an Instagram-ready snap, you can head over the Horseshoe Bend or the Colorado River in Arizona.

17. Arlington Green Covered Bridge, Vermont.

Vermont has more than one hundred covered bridges, by the Arlington Green Covered Bridge is the oldest and most well-preserved.

18. Carlsbad Cavern, New Mexico.

Carlsbad Cavern is one of the most famous and oldest cave systems in the world. It has massive underground chambers which are filled with eye-catching speleotherms.

19. Hamilton Pool, Texas.

The Hamilton Pool in Texas is one of the most otherworldly, at the same time, beautiful lakes in the world. It is part of the Travis County Park.

20. White Pass and Yukon Route Railroad, Alaska.

The White Pass and Yukon Route Railroad offers an exhilarating ride and outstanding panoramic views of surrounding peaks.