An oddities shop packed with twisted treasures inspired by Oscar Wilde and Edgar Allan Poe.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Fantastic collection celebrating the final send-off.

DIY collection of eclectic holdings.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

The Grand Canyon of Texas.

A modernist landscape of water and sci-fi concrete.

Continuing the tradition of the dime museum in style.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

An eclectic collection of thousands of items owned by the sculptor Frederic Marès.

A once-secret library of Freemason history in Catalonia.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

A temple to modernity, tucked away amid Barcelona's more well known museums.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A beautiful but toxic fountain of mercury.