A corkscrew-shaped barn in Ireland.

A floating museum that was sunk by a flood and left to rot in the tides.

A private collection of massive steel monsters guarding a Texas pipe works.

There must be a pun in this haystack somewhere...

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Breathtaking and huge 430 year old maps of Italy.

Once one of the largest producers of pig iron in the world.

Go inside to really appreciate this 500-year-old technological masterpiece.

100 year tradition of fist fights, marked by marble footsteps.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

This Mediterranean castle was built for a millionaire and his giant dog.

New Orleans' famous cemetery, located on the site of a former race track.

A mini Wrigley Field for mini baseball players.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

These pretty kitties killed and ate as many as 135 railway workers.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Try not to get slimed in Tribeca.

Avoid gangster interaction while window-shopping.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

A building so large that it has its own weather.

At 207 feet, one of the world's longest continuous escalators.