Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

Brain collection and database that narrows the gap between man and animal.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

Home to a monument dedicated to the American Rock duo along with a collection of music memorabilia.

The world's longest known cave system.

Elvis's own personal tropical hideaway.

This replica of the Greek structure is in the heart of Nashville.

A crumbling hospital from the 1850s on Roosevelt Island.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

Bizarre and inspired combination store selling only two items: tires and bibles.

Veritable museum of 20th century country music history.

A small 19th-century graveyard tucked away in the middle of a suburban neighborhood.

A historic cemetery with unique artwork, a Civil War fort, and also happens to be the site of the Battle of Bladensburg.