Commemorating the spot where the famous scientist fed his pigeons.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

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.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Visit the monolithic tomb of America's most famous general.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Peek through the gates at this oasis from the city, full of Old English charm.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

This seemingly random 30-foot statue of an oryx in Qatar's capital was a mascot for the 2006 Asian Games.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

A surreal statue honoring Prague's favorite literary son.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

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

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."