Places Stymphalian Wants to Go

A Gothic cathedral created from volcanic rocks.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

A lush vertical garden blooming in the heart of Paris.

This little-known national museum houses over 40,000 works of art from across the world.

This museum contains a vast array of puppets and marionettes from all over the world, featuring incredible works by Portuguese creators.

This ornate neo-Gothic mausoleum honors the man behind the Mercedes name—and the daughter who inspired it.

The construction of a tram line unveiled hidden remnants of the old medieval city.

One architect's organic, human-centric design has been fully realized in this alien art house.

Avant garde house of Pierre Cardin on the Cote d’Azur.

Buddha and Jesus tower over this French mountainside headquarters of the Aumism religious cult.

One of the greatest maze designer’s greatest mazes.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

A lush oasis full of vibrant plants and striking geometric displays.

Nearly every wall in this French villa has been "tattooed" by artist Jean Cocteau and other famous painters.

Entire apothecaries are on display at this Lisbon museum, which explores the history of medicine.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

A sandstone block marks the alleged spot where the legendary writer was conceived.

An ancient monastery, a locked room, and a mysterious book heist.

An unassuming Swiss institution houses Europe's largest toy museum.