A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

A hands-off space for graffiti artists to hone and display their skills.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

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

This ruined folly was originally built to honor a failed American state that would have become "Westsylvania."

A large sculptural artwork and garden in Escondido, California.

A clock designed to run with perfect accuracy for 10,000 years.

A museum befitting the city responsible for supplying the majority of the world's LSD.

A vast city of the dead, where the deceased outnumber the living by more than a million.

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

A large instrument played by the wind.

A world-class observatory in the California desert.

Along a California highway is a kind of Jurassic Park made of metal.

Location of the most powerful laser in the world, and the potential birthplace of tiny stars.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

Derelict chemical plant on the North Sea is a beautiful industrial ruin.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

Two monstrous faces loom over a village in Czechia.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

Michael Heizer's masterwork in the Nevada Basin.

A hotel and restaurant serving as the mecca of kitsch.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.