A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

The first piece of public art dedicated to LGBT rights.

A dilapidated dock tells the story of Titanic's missed arrival.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The most confusing clock in New York.

The only subway station in the city that still makes use of gap fillers.

On this island, you suck away your garbage via an elaborate pneumatic tube system.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

Look closely and you’ll notice that the color changes a third of the way up the tower.

There’s a hidden military meme engraved on the World War II Memorial.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

London's smallest police station is barely the size of a phone booth.

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

One of the most dazzling dioramas at the American Museum of Natural History is also one of the oldest.

This poignant display is now a memorial to these regionally extinct species.

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

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

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

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