A tunnel with windows, so you don't miss out on the impressive views.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

The celebrated eyesore created by starry-eyed sweethearts.

The drama of nature in full effect in this Nevada State Park.

This giant temperature attraction created some giant electric bills.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

Eighty million natural history specimens call this gargantuan museum home.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Cabaret where the show girls are all androids, and the patrons couldn't be more pleased.

This bridge is haunted by the ghost of a distraught mother.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

Historic Greenpoint theater, turned roller disco, now housing a chain pharmacy store.

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