Home with Gothic windows featured in a famous painting.

Unrepaired walls from a 1920 anarchist bomb attack.

Eco-friendly island mansion.

Hiroshima survivor on Riverside Drive.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Early prototype for Frank Lloyd Wright's Guggenheim.

World War II bunker still standing on the New Jersey beach.

Enormous lake at the bottom of a unique cave system.

On the Hudson resides one of the largest clocks in the world.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

137 graves holding New England's earliest residents.

Statue commemorating the use of ether in anesthesia.

More than five miles of underground passageways.

Cemetery featuring rare glass-fronted columbarium.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A world of whimsy and wonder aboard a one of a kind historic landmark vessel.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

While there are no actual snakes in the history of this crooked road, there may be a number of dead horses.