The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

America's first federal monument.

This simple stone memorial remembers a secret, Geneva Convention-defying interrogation base from WWII.

The remains of this ancient fortress atop a manmade hill look as though they were built into a volcano.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Used as an example in one of the first dictionary entries for "museum" in 1706.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

This 11th century tower is said to be the oldest building in Oxford.

A wall of chewing gum moonlights as collective art.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

World's first "penitentiary," meant to be humane, drove men insane.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The home of the Dead Sea Scrolls is an abstract modernist dream.

Come for the gun-toting hillbilly madman, stay for the ice-cream loving basketball bears.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A former major munitions plant that has been converted into a sprawling art space.

A comprehensive collection of Pez dispensers.

Home to items never before seen by the public.

Eccentric concrete mansion and museum designed and built by hand from the inside out.