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

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

Overshadowed by quilts, the artistry of these patterned textiles went underappreciated for too long.

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

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

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

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

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

There aren't too many operational funiculars around, but Pittsburgh has two!

Yo, Adrian!

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

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

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

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

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

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

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

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

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

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

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