The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

Home of the only civilian casualty at the Battle of Gettysburg.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A piece of baseball history is preserved in a Pittsburgh parking lot.

The last funhouse of its kind, where guests enter through the mouth of an 80-year-old blue whale.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

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

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

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

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

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

The “American Gothic" artist's largest works hang in an Iowa State University library.

Millions of dollars worth of sculpture decorate this Iowa city center.