This residential door allows San Francisco muggles a glimpse at the wizarding world.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The highest bridge in America was built for an almost unnervingly small amount of money.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The largest self-built castle in the U.S., six decades in the making.

This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

Ride aboard a centuries-year-old steam engine and explore dozens of trains parts, including an unusual "comboose."

This unassuming oasis elevated just above the busy streets of Jerusalem offers one of the best views of the Old City.

A collection of haunted objects and macabre oddities under one roof.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

A snapshot of the city's fascinating voodoo culture.

A way to take your secrets to someone else's grave.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

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.

Large tower used for simulating radiation of Hiroshima bomb and the tallest object ever relocated.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

The contents of this safe survived a 37-kiloton nuclear bomb.

Potential high level nuclear waste storage site for the next 10,000 years and beyond.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.