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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The ballpark in "Pigtown" where the Brooklyn Dodgers made their name was replaced with a huge apartment complex.

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

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

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

A beautiful bamboo trail tucked in this famous Japanese Shrine.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Nature and beauty amidst pollution and industrial wreckage.

Four cars from the old system were once on display, but were removed in 2014.

A mass grave for victims of one of the city’s worst fires.

A modern zoetrope on the New York City subway.

A hidden architectural treasure in New York's Brooklyn.

One of the deadliest American air disasters is nearly forgotten in Brooklyn.

A collection of unique outdoor sculptures surounded by the beauty of nature.

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

World's first "penitentiary," meant to be humane, drove men insane.

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

The bones of an old zoo crumbling in the shadow of a new one.

One man's attempt to create an artistic wonder on a run-down block in Detroit.