The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

The world's largest piece of copyrighted artwork.

More than 200 unconventional musical instruments that anyone can play.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

A mysterious echo seems to defy the laws of acoustics.

Colorful clay cliffs tower over an unofficial nudist beach on Martha's Vineyard.

A perfect circle of 24 mysterious holes dates back to prehistoric times.

This abandoned Slovenian military barracks has become a punky-political art squat.

This demon atop the Notre-Dame de Paris looks utterly bored.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

Every color in the rainbow awaits.

Peace Park and the Atomic Bomb Dome.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

This 700-year-old street food market features baby octopus and soy donuts.

A beautiful bamboo trail tucked in this famous Japanese shrine.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Go through the looking glass in Tokyo's Wonderland-themed shop.

After being lost for decades, this striking mural depicting the atomic bomb covers the wall of a busy Tokyo metro station.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

A second generation sun-powered marvel lights up the night.

An offbeat angle on the ocean viewed through an antiquated lens.

One of the first skyscrapers in Santa Monica, and a famous getaway for the Hollywood elite of then and now.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.