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.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

Yo, Adrian!

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

As the oldest natural history museum in the Americas, these halls contain everything from dinosaur bones to biological samples collected by Lewis and Clark.

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

Huge masonic hall in Philadelphia with lavishly themed rooms.

The Fabric Workshop and Museum showcases fabric and mixed media work by artists of great international renown as well as local and outsider artists.

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

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

This overlooked courtyard and museum celebrate Benjamin Franklin's life and achievements.

Mural made of 100,000 pieces of hand blown glass, and one of the largest glass murals in the US.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Tucked into Pittsburgh’s North Side, the Mattress Factory is a labyrinth of permanent, room-sized installations where artists transform entire spaces into mind-bending, immersive worlds.

Rare recess caves fill this unbelievably beautiful Ohio park.

The mounds at this site were reconstructed with the help of archaeologists and historians.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.