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

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

The abandoned coal loading dock is a canvas for unsanctioned art.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

This might just be the TARDIS of bookstores.

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.

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

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

An abandoned stretch of highway, deteriorating next to the operational one.

A toxic ghost town sitting atop a massive coal fire.

The Old Man of the Mountain’s less-famous, but still beloved little brother is said to resemble a leader of the Abenaki tribe.

This small-town library was the first in the world to be entirely supported by taxation.

A beautiful Gilded Age hotel in the White Mountains with surprising diplomatic history.

A serene plaza that commemorates one of the Granite State's most iconic figures.

This riverfront statue honors the inventor of the first video games ever sold.

A town wears its heart on the sleeve of a smiling girl, arms flung wide open in a cheerful greeting for all who encounter her.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

The only one of New Hampshire's original 14 World War II watchtowers to survive in near-original condition.

This New England drive-in was built to straddle the border between two states.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

This mountainside mural of a person carrying a torch was created for the 1994 Winter Olympics.

A stunning architectural yet functional feat, towering over Oslo.