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

Yo, Adrian!

Dr Barnes' $25 billion private collection of art and arboretum.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The world’s first penitentiary, meant to be humane, drove men insane.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

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

Mysterious 500-year-old tapestries depict a unicorn hunt.

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

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

Elevated freight railway turned wildly successful urban park.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.

A haunting painting meant to capture the calamity of World War I.

The pockmarks across the building's facade are remnants of the Blitz.

A mysterious shape catches the eye in this 16th-century painting.

This ancient Egyptian obelisk still bears the wounds of World War I.

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

The commemorative stone column conceals a secret laboratory.