Hans Christian Andersen for the postmodern world.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

The first skyscraper to include a Ferris wheel built into the facade.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A bizarre house filled with an astounding array of collections.

Unique antiquarian shop specializing in globes, maps, and prints.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

If astronomy had a ghost, it would look like this observatory.

This massive underground salt mine now holds a sci-fi theme park in its depths.

This enormous "shamoji" means more to the people of Miyajima than just a way getting rice onto a plate.

The world's largest anatomically accurate brain sculpture.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

A Manhattan office building is home to the world's largest chess board.

This lab's maddening silence is good for business but bad for sanity.

A hip bar decorated with walls of golden skulls.