Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

This picturesque island graveyard is the final resting place of dozens of notorious pirates.

Some of the earliest burial grounds of New York State are to be found hidden away in this quaint town.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The world's most remote permanent settlement on an active volcano.

This massive marble memorial was built bit by bit either out of devotion or spite, but at the expense of the surrounding town.

The trials and tribulations of marking Poe's grave.

The haunting history of a little girl lost.

Two flush headstones mark the only known graves to be embedded in an airport runway.

The right to a full beard is honored by the grave of a man who was attacked and jailed due to his facial hair.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

The violinist who played on as the Titanic sank is buried in this quiet English cemetery.

Dedicated to an "Unknown Man," this grave holds either the remains of a lovelorn suicide or a Cold War spy.

A mad mystery man who led Canadian mounties on a 150-mile wilderness chase is still buried with his secrets intact.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

A strange mark in the stone fence of a cemetery fabled to have been made by the Devil himself.

A small, but award-winning beach known for its literally spotless reputation.

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

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A massive underwater sinkhole made famous by Jacques Cousteau.

An acoustic anomaly with a mysterious cause.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.