The world's largest underwater restaurant is submerged off the southern tip of Norway.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

A single tree's 2,800 aerial roots give the appearance of a complete forest.

A refurbished locomotive from a bygone era in the middle of the Jordanian desert.

This candy-colored storybook village originated as a 19th-century Methodist campground.

One of the two USPS mailboats left in service docks regularly at Weirs Beach, Bear Island, and other Lake Winnipesaukee islands to deliver their mail.

Running since 1864, this clock has yet to be wound, one of the longest-running science experiments known.

Visit a family-run restaurant that has been serving the epitome of soul food for more than seven decades.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

The world's largest bioluminescent area was undiscovered by science until 2005.

Tubing through a cave lit with glowworms is a magical underground experience.

Bioluminescent firefly squid light up this Japanese fishing port.

Australian Lake set aglow by Noctiluca Scintillans.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Malaysian fireflies create a dazzling display as thousands light up in unison.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

These eerie outliers of the lightning bug family glow a mysterious blue color.

A glowing underwater cliff attracts marine life and divers in equal measure.

Once the path of a railway tunnel, now home to thousands of glowing insects.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A galaxy of glowworms—larvae of a gnat—hides deep in the belly of these caves.