This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

There aren't too many operational funiculars around, but Pittsburgh has two!

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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

Commemorating the spot where the famous scientist fed his pigeons.

Amid the marketing blitz of modern Times Square is an elegant holdover from its showbiz glory days.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

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

On the Hudson resides one of the largest clocks in the world.

A semi-scholarly approach to sex.

A failed piece of Orientalism has become the proud symbol of a community.

A toxic ghost town sitting atop a massive coal fire.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This little museum in the town where zombies were born celebrates the living dead.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

An astounding collection of medical specimens, including bits of President Lincoln.

Remnants of a storybook amusement park hidden behind a strip mall.

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

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

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.