This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

The bomb-ravaged remains of of a colossal Neptune.

Five candy-colored villages on the Italian Riviera.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

Fantastic views and thousands of love locks.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

This building has a giant piercing through one of its corners.

A fake medieval village in the middle of Turin.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

This medieval cathedral houses stained-glass windows featuring saints and pretzels.

This Late Gothic building that once housed Erasmus is now known as the filming location of "Suspiria."

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

A little-known sculpture park of contemporary environmental art in a Lapland forest.

The world's first purpose-built indoor shopping mall opened in Sweden in 1955.

Stockholm's narrowest alley is barely over two feet wide.