An underwater city for the dead.

Where beautiful signs live on forever.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Olfactory delights in San Francisco's Botanical Gardens.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Towering basalt columns, a creation of fire and ice.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A beautiful geyser under environmental threat.

A house carved into a rock in the 1940s.

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.

Its buzzing collection honors vibrator history.

This abandoned amusement park was built on a site with a dark history.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

The first declared National Monument in the United States.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

A hand-built folk art installation covered with messages of God's love.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

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