When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

What is the Thing?

See massive fossils that are over 200 million years old in northeastern Arizona.

Most-visited and most-photographed slot canyon in the American Southwest.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Dramatic river bend surrounds a natural red-rocked pedestal.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Though the case is scorched and the buttons half-melted, this hardy handheld gaming device can still run a game of Tetris.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A natural gas leak provides a flickering flame beneath a waterfall.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

The world's second largest rocking chair is found on Route 66 in Cuba... Missouri.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

An acoustic anomaly with a mysterious cause.

The tombstone of an unfortunate explorer who disappeared in the Paris Catacombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The bronze uniforms commemorate the vital role of women during World War II.