A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

The most peaceful "country" in the Middle East.

Submerged ruins of a Neolithic coastal settlement, where houses, wells, graves and skeletons have been unearthed.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

This family tattoo parlor has been inking religious pilgrims in the Middle East for 700 years.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

A beautiful 62-acre Catholic shrine and botanical garden.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Where America's first doomsday cult awaited the end of the world.

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The remains of the first punk club in L.A.

The hotel room where Janis Joplin tragically died has now become a makeshift shrine to the singer.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.