From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

The world's largest piece of copyrighted artwork.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

The world's largest rotating world.

Oldest synagogue in the United States.

A very big rock just plopped down in the New England woods.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

The world's oldest and largest museum of mass transit vehicles.

Once a private collection, now the only museum of arms and armor in the Western Hemisphere - CLOSED.

Civil War Fort on an island in the Boston Harbor.

A beautiful Victorian-era cemetery, complete with a miniature village.

An 80-year-old house built out of newspapers.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

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

Two thousand artifacts from around the world collected by one woman who loved to travel.