Amazing views of Long Island Sound can be seen from this mountaintop tower.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

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.

Avoid gangster interaction while window-shopping.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Sniff the Titan Arum's rotting flesh.

A stretch of New Hampshire lake water is the only ice runway in the lower 48 states that is FAA-approved.

Tiny castle in the middle of the Rhine made you pay to pass.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Built around 1723, this is the oldest surviving home in the U.S.'s oldest colonial city.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

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

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This demon atop the Notre-Dame de Paris looks utterly bored.

When California condors were hovering on the brink of extinction, this recovery program was charged with helping the birds thrive again.

Built as a schoolhouse in 1914, this Mission-style building has also served as a dancehall, a library, an Army canteen, and now a cultural museum.

A man killed in a hunting accident is eternally guarded by a granite hound tombstone.

A small obelisk marks the spot where Captain Sam Greele was killed by a falling tree.