This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A museum dedicated to exhibiting remarkable outsider art.

Bouncing, delightful, mechanical art at the MIT Museum.

Naturally protected city carved from a rock face.

This concept building is the UK's first attempt at making a permanent structure of nothing but trash.

Part bookstore, part café, and part forest.

A 19th-century Baja cantina that many say is the birthplace of the margarita.

One of the world's largest Tesla coils.

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

A park in Mexico offers all the experiences of an illegal border crossing except for one: the border.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

The secret city built by the Manhattan Project.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

Fire meets ice at the southernmost volcano on Earth.

Got apples?

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

An ancient artistic garden parlor full of hidden water wonders.

A museum of carnival attractions where you are invited to ride the rides.

The wreckage of a tragic plane crash is on display at this museum devoted to a famous Italian conspiracy.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

The premier place to experience the Victorian imagining of the steam-powered future.