Don't be a grizzly man. Get personal with Alaska's wild bears from the safety of this conservationist camp.

The "Gateway to the Arctic" connects Barrow's indigenous population with the sea and its traditional industry: whaling.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

This sprawling woodland estate was the brainchild of iconic American industrial designer Russel Wright.

Astonishing collection of helmets, scientific instruments, and medical models.

The former estate of the Guggenheims, part of the opulent Gold Coast that inspired the Great Gatsby.

An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.

What was once a vast naval cemetery is now home to nesting birds and pollinating bees.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

An intricate and amazing house built by architect Karl Junker.

This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

This massive sycamore tree has been labeled as one of the largest in the state.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

This museum explores the grim reality of life in the earliest British colonies in America.

Dine like an American revolutionary at Colonial Williamsburg.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

The Cadillac Ranch for monster truck aficionados.