A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

Nature took her revenge on the "Wickedest City in the World."

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

Each year melting snow turns these Austrian hiking trails into scuba zones.

Submerged ruins of a Neolithic coastal settlement, where houses, wells, graves and skeletons have been unearthed.

A massive underwater sinkhole made famous by Jacques Cousteau.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

For divers and music lovers, the Florida Keys' Underwater Music Festival provides the best of both worlds.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

The mass grave of a heroic Revolutionary War regiment sits below an empty lot near the Gowanus Canal.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The humble fort that saved Washington.

"There's nothing there," and other lies the KGB told us.

Meet the world's longest tapeworm in a collection that really gets under your skin.

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

This museum boasts the ninth-largest collection of insects in North America.

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

The "original web site," this farm in Northern Vermont encourages orb-weaver spiders to build their daily webs, and then sells the preserved masterpieces.

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

Hundreds of tiny dead butterfly eyes gaze down at diners in this Australian eatery.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

Montreal's colorful subway station shows its support of the local LGBT+ community.