An exotic reptile facility showcasing some of the rarest, most venomous snakes in the world.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

A forgotten sea village stands silent after hurricanes deemed it obsolete.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

This woodland architectural installation acts as a camera obscura for the heavens.

Native Americans built this circle of stones, which was used to predict astronomical events.

A walk through the historic city center, under the streets of Seattle.

A colorful architectural gem in Seattle’s uniquely modern Central Library.

A wall of chewing gum moonlights as collective art.

This former coal gasification plant found a curious second life as a popular public park.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

A giant Troll lurks under one of Seattle's oldest bridges.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

These azure waters were thought to lead to the Mayan Underworld.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

The ancient latrines of the Greeks, in all their public glory.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.