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

European castle ruins in an American state park are actually the product of death and grief.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

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

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

A museum dedicated to a sea that should have never been.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

The first declared National Monument in the United States.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

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

Only known mainland rookery of the threatened Stellar sea lion.

The ghostly remains of an accidental sea.

Ancient pueblos built into the base of a natural canyon wall.

This historic national park is covered in the stunning ruins of red rock pueblos.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This picturesque abandoned home is rumored to be a spite house.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

Stroll through a wonderland of stupendous moss-covered trees.

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