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

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

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

Within this beautiful Pittsburgh cemetery, a unique headstone bears witness to one man's eternal love for Jaws.

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

This public park was the site of the largest civilian disaster of the Civil War.

This Old Testament garden features 100 plants from biblical times.

The last street in Pittsburgh that's paved with wood.

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

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

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

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

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

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

One of Gettysburg’s least visited battlefield memorials is off the beaten path, but worth a visit.

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

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

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

This grove was planted more than a century ago by the War Mothers of World War I.

The trials and tribulations of marking Poe's grave.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.