Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

This collection of odd proofs of concept is like taking a walk through the imagination of a Victorian engineer.

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

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

This might just be the TARDIS of bookstores.

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

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

The Home and murder site of the witch of Rehmeyers Hollow.

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

An outlandish shoe shaped house built by an eccentric millionaire.

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

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

The first of Lancaster's "rural cemeteries."

The towering figures were created from the cemetery's fallen old-growth trees.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

An Industrial Revolution-era public work that purified water using nothing but sand.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

Largest Roman Catholic church in North America.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

The whole world in one water tank.