A magnificent winding road through a steep valley, with deep natural caverns at the bottom

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

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

A museum dedicated to a Cold War era sausage.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The world's largest fully steerable radio telescope.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The United States Capitol's former columns still stand.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

A small chapel celebrating the spiritual bond between dogs and humans.

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

I-95's Tijuana-style celebration of kitsch at the Carolina border.

The magic's in the hole!

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

"I did this all while you were watching TV."

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

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum dedicated to the alleged Roswell Incident.