Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

An art installation commemorates journalist Nellie Bly's undercover reporting inside a New York asylum.

The only boathouse Frank Lloyd Wright ever designed was also the only unbuilt structure in his famous Wasmuth Portfolio, until 2007.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

America’s smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

The world’s first penitentiary, meant to be humane, drove men insane.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

A reproduction of earth's many biomes.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

The world's largest military aircraft cemetery.

This church on a Tohono O'Odham reservation has stood since 1797.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

America's only nuclear missile silo open to the public.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

Stairs often replace streets on the steep slopes of this old mining town.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

This fireplace-turned-monument pays tribute to the assassinated U.S. president.

The former home of the army detachment that captured Geronimo.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.