This mesmerizing kinetic sculpture blossoms endlessly in the breeze.

The vaulted ceiling is home to a scurry of “squirrelgoyles.”

The remains of a century-old mansion that met a fiery demise years after it was deserted.

A unique sculpture park that specializes in the huge and bizarre.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

During World War II, blimps were a key part of the United States' defense against German U-boats—this building could house a dozen of the armed airships.

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

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

Eighteenth century house of the mysterious "Father of Raleigh."

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

This Transylvania County city is home to a rare white squirrel population that is descended from an escaped carnival animal.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

This research center for rare prosimians is studying how they sleep to help prolong human life.

This woodland architectural installation acts as a camera obscura for the heavens.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

So many migrating birds roost on the bridge, it has a special summer speed limit.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.