The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

A public urinal so pretty, it was declared a national monument.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

The home of the first American-born saint is one of the only curved buildings in New York.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

The most confusing clock in New York.

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

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

An artist's cute bronze subway sculptures belie his violent artistic past.

A bit of retro transportation flair preserved in the world's largest department store.

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

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

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

This neighborhood grocery houses a treasure trove of Eastern European delights.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

Once a dumping spot, now a park with a kayak launch.