The first declared National Monument in the United States.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A trash dump made beautiful by nature's power.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The "lovely red Vega" of the legendary record-settling pilot.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The most decorated dog of World War I is preserved in the Smithsonian.

Home to items never before seen by the public.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

Iconic Los Angeles residence famous for its 19 statues of Michelangelo's David.

A typical "Old South" manor, once owned by author Anne Rice, served as the setting for several of her witchcraft sagas.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

Few other hotels can rival the grandeur of the Castle in the Rockies.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A little sculpture with a large wardrobe.

Scattered throughout London are ancient remnants of the city's former bounding wall.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

Take a steam-powered ride straight out of the past on this Appalachian rail line.