America's most famous piece of self-built architecture.

In this Florida couple's cottage, nearly every surface—inside and out—is covered in mosaic artwork.

An enchanting work of outsider art, full of whimsical sculptures and carvings.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

These moss-covered medieval ruins tower atop the smallest of Ireland's Aran Islands.

Certain traditions prevail on the least-visited island of the Aran Islands.

The video game-themed street art first popped up in the French city.

There’s a special club house at the top for the bell ringers.

You may recognize this beautiful grove within Kaitoke Regional Park as location of the house of Elrond.

Leave a trinket at this artistic collection of mailboxes.

The world's only complete colossal squid specimen is on display at the Te Papa Museum.

Inside this faux cave, visitors can learn how some of their favorite fantasy characters were created.

Yo, Adrian!

The classic Atari game's iconic aliens have invaded downtown San Diego.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This candy-striped tower is the farthest east you can go in the United States.

Bronze footprints mark the path where a civil rights leader tried to march in peaceful protest before being knocked unconscious.

St. Augustine's record-setting narrow street was designed to protect against pirates.

Only through the lens of a microscope can visitors see the true treasures inside this museum.

The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.

A sprawling maze of used books piled from floor to ceiling.

Remnants of a storybook amusement park hidden behind a strip mall.

A local farm's collection of unusual structures from a now defunct storybook amusement park.