These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

The best Tiki bar in Las Vegas.

A "Titanic" superfan changed his name to Jack and set up this strange shrine to the blockbuster, complete with Korean food and Tarot readings.

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

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

A house carved into a rock in the 1940s.

A castle built by an eccentric medieval enthusiast in rural Ohio.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

This serene oasis in an affluent Los Angeles neighborhood holds some of Gandhi's ashes and got Elvis into Eastern Philosophy.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A modernist landscape of water and sci-fi concrete.

A heavenly experience, right here on Terra Firma.

Sniff the Titan Arum's rotting flesh.

Read a book next to a Midtown waterfall.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

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

A trash dump made beautiful by nature's power.

The first declared National Monument in the United States.

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