This restored 18th-century house was once the home of Lititz's first tobacconist.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

A local prank turned town icon.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

A failed piece of Orientalism has become the proud symbol of a community.

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

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

This might just be the TARDIS of bookstores.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

One of the oldest Catholic churches in the U.S., situated just east of Gettysburg.

These small house replicas have stood proudly since the 1950s, even as the property has changed hands.

This iconic Lancaster everyman has been reading the same story since 1980.

Political activist and writer Thomas Paine once lodged at this location.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

A tribute shrine where the Space Invasion street art movement started.

A unique post-modern public space in the middle of the Warehouse District in New Orleans.

This Masonic lodge was the first major private building to be constructed in Washington, D.C. after the Civil War.

This coastal port saw one of the most significant battles of the Civil War.

This Civil War monument was designed by an eccentric architect and Gettysburg veteran.

In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

The "Key of Keys" for Washington, D.C. and the apocryphal landing place for the military campaign that started George Washington's career is now at the bottom of a well.

An 18th-century townhouse that once hosted guests of the president.