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

Yo, Adrian!

This sculpture of a fisherman spent six years at the bottom of the Schuylkill River.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

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

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

Venture into the past with an unlisted exhibit hall featuring extinct birds.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

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

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

A daily replay of the experiment that proved the rotation of the Earth.

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

An Irish Memorial commemorating those who perished due to potato blight.

Trace the history of the nation’s early days at the site of America’s oldest stock exchange.

Alexander Hamilton’s creation caused quite a bit of controversy.

Where some of America's earliest LGBTQ rights protests marched each Fourth of July

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

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

After his presidency, George Washington planned to live only a few blocks from the Capitol building.

The tunnel under the Capitol Building where Congress takes out its trash.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.