Outsider art meets paleontology at this roadside reptile repository.

A natural spring situated on the grounds of the Hawthorne estate.

A small cave hidden deep within the Jenny Jump State Forest.

These unique rock formations were created during the Ice Age.

This national landmark is also home to a massive treehouse.

Grand architectural relics gain a new life in this Pennsylvania warehouse.

A sacred collection of indigenous rock art.

The oldest farmer's market in America is so ancient it was approved by the King of England.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

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

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

Construction uncovered this trove of fossils, which visitors are welcome to add to their own collections.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

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

The largest collection of Frazetta originals in the world.

An ideal wedding spot that is almost too ideal.

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

Locals call this magical moss-covered walkway the "Emerald Path."

Catch a ride through the Pennsylvania countryside on this historic narrow-gauge railroad.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

There’s a hidden military meme engraved on the World War II Memorial.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.