An elevator into the Baltic Sea.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

Cave carved out of a huge snow drift collapsed killing one and injuring five in July 2015.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

Destructive children, start your engines.

A library and museum dedicated to typography.

The self-mummified monks of Japan.

Second largest wastewater treatment plant in the country.

Located in a beautifully restored ice house, this museum is the result of decades of hard work and devotion to the craft of plumbing.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

Where the oil industry began.

Toy museum in a former tavern is the expression of one man's life pursuit of the aesthetic power of cartoon imagery.

Over one million bird-related artifacts await.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

A former hen house turned curiosity cabinet displays one man's lifelong fascination with cannibalism.

New York's oldest and possibly grandest keeper of books.

One of only two towns in Israel populated by Circassians, a sect of Sunni Muslims who are also devoted to Israeli military service.

An abandoned castle owned and ignored by Masons carries a cursed history.

The "last holdout of the Confederacy” actually sat at the edge of the Canadian border.

Fine dining 20 feet below the surface in the Indian Ocean.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.