Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

A local prank turned town icon.

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

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

This park contains a number of standing stones meant to heal and inspire.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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

In which a local geological marvel becomes a quaint roadside attraction.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

The facade of this bank has changed little over the centuries, including its unique welcome sign.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

A six-ton wedding present for the King of the Scots.

The colorful stairs are made with marble from the world's major quarries.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

A sweet symbol marks the place where torturous executions were once carried out.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A little sculpture with a large wardrobe.

Hidden within the waterfront hills resides this dilapidated military stronghold.

A World War II structure that has stood the test of time.