The world's second largest single-dish radio telescope, once used to contact E.T.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The largest source of fossilized insects anywhere.

The clock that sets them all.

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

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Collection of fossils, plants, and ancient animals encased in amber.

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

An ancient Viking village in North America that predates Columbus by 500 years.

The folks at the Devil's Rope Museum want you to get hooked on barbed wire history.

A forlorn fishing village on the coast of Labrador, full of shipwrecks and Spanish gold.

The remnants of an early American attempt at missile defense.

At the "Garage Mahal" in Houston, car culture is about more than just driving.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

Home to Hollywood history and a very special salt crystal.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

Cannon designed to fire an atomic warhead.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

One believer transformed a local curiosity into proof of Vikings on the Great Plains.

The first hand-illuminated, hand-written bible since the invention of the printing press.

This former mining town was named the most toxic town in America.

Minnesota's oldest and deepest mine is now an underground physics laboratory.