At 207 feet, one of the world's longest continuous escalators.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Largest Roman Catholic church in North America.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This cave holds a surprisingly colorful variety of geological oddities.

Ever wanted to can Spam?

This taxidermic smorgasbord was co-created by an artist poached from the Museum of Natural History.

A museum dedicated to the alleged Roswell Incident.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

The headquarters of a secretive order is also a beautifully-designed park.

An extensive collection of ancient Egyptian artifacts and mummies.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

A trading post in the North Pole where children send letters.

The king of U.S. high points towers over every other peak on the continent.

A gas station has taken the place of the home of the 19th American President.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

The largest earthwork effigy in the world.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.