Each year, one talented artist puts on a show sculpting twelve butter-based busts of dairy princesses.

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

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

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

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

Yo, Adrian!

The first American department store, and home to the largest operating musical instrument in the world.

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.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

A toxic ghost town sitting atop a massive coal fire.

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

Mysterious rocks that ring musically when struck.

Hiding amid the largest camellia collection in the country lies a charming children's maze, donated by a secret admirer.

NASA's leading space science lab started by a co-founder with deep ties to the occult.

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

An offbeat angle on the ocean viewed through an antiquated lens.

A modern day curiosity cabinet.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Triangular House built on a leafy residential street in St. Paul.