This fancifully decorated Victorian home in New York’s Hudson Valley is the only known fully domed octagonal residence in the United States.

This miniature village stays behind in the Breuer Building, even as the museums around it come and go.

Even for Egyptian royalty, the afterlife was bring-your-own-beef.

A giant roll of mints marks the birthplace of one of America's most famous candy brands.

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 28-foot granite map plots the locations of 40 theaters in New York City.

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

This elaborate towering structure was once famed for its revolutionary height.

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.

This stone bridge is all that remains of a submerged New Jersey town.

This national landmark is also home to a massive treehouse.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

The celebrated eyesore created by starry-eyed sweethearts.

The video game-themed street art first popped up in the French city.

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

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

100 massive sculptures in the Hudson River Valley.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

The first American department store, and home to the largest operating musical instrument in the world.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.