The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The magic's in the hole!

A museum dedicated to the history and exploration of both popular music and science fiction.

A walk through the historic city center, under the streets of Seattle.

The oldest surviving botanic garden in the United States.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

This beloved marketplace mascot poops money and grants good luck.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

These medicine cabinet staples are part of the museum's collection of everyday objects.

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

The 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.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

Contrary to popular belief, this secluded statue doesn't represent Pennsylvania's founder.

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

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

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

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.