Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Two stunning 17th-century libraries and a cabinet of curiosities.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Countless grotesque faces stare out from this eerie Prague art wall.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Macabre astrological automaton clock dating to the late 1400s.

The statue of a cursed knight is said to come to life every 100 years.

A Jenga-style cylindrical tower of books that appears to go on forever.

The medieval "Bearded Man" relief still serves as a clever flood warning marker.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

This automated sculpture of two men peeing will spell out text messages with their micturition.

This stately brick building once provided supplies and equipment to lighthouses across the northeast during the 19th and 20th centuries.

The site of the deadly Triangle Shirtwaist Factory Fire.

Try not to get slimed in Tribeca.

A touching tribute to the "Queen of Soul."

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

Tucked away amidst some of the most famous addresses in the world is New York’s only fraction of a street.

Step inside one of America’s rare poteaux-en-terre French houses.

Sail on this replica of the first American privateer vessel to make a capture during the War of 1812.

Family-run for more than a century, this pizzeria makes a unique mustard pie.