The longest hedge maze in the world.

Arlington Cemetery exhibit dedicated to death and grieving.

Natural time capsule containing an alien ecosystem.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A library of rare occult books in Los Angeles.

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

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

An acoustic anomaly with a mysterious cause.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

These azure waters were thought to lead to the Mayan Underworld.

A picture-perfect town, perfect for blowing up.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

New York City's smallest piece of private property.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The world's longest known cave system.

An unusual round church in London with a Templar past.

Tubing through a cave lit with glowworms is a magical underground experience.

A hip bar decorated with walls of golden skulls.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A modern day curiosity cabinet.

Home to items never before seen by the public.

A mysterious castle built as a monument to lost love.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.