One of many gator theme parks, abandoned in the sugar fields of South Florida.

The smallest post office in the United States is no bigger than a broom closet.

The largest retailer of seashells in the world.

A tribute to Ponce de Leon's supposed quest for eternal youth.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Three columns of volcanic rock shoot out of the ocean.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Medicinal spa created with the discharge from a geothermal energy plant.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This stunning concert hall has become a symbol of Iceland's national recovery.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

The ghost town that ended up on Ebay.

A natural gas leak provides a flickering flame beneath a waterfall.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Lie in a hammock where George Washington stood.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A dilapidated dock tells the story of Titanic's missed arrival.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.