Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

Dr Barnes' $25 billion private collection of art and arboretum.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

A layered tribute to the work of mosaicist Isaiah Zagar.

Century-old shop, specializing in Occult products.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

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

The oldest surviving botanic garden in the United States.

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

These lush botanical gardens employ the most purrfect pest control force.

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

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

Bizarre Cavern.

One of the last active volcanoes on the Eastern seaboard.

This free, take-a-book shop seems like a trick but isn't.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

A hidden alley in urban Baltimore is a haven for graffiti artists.

A museum dedicated to exhibiting remarkable outsider art.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

Take an otherworldly journey in a school dedicated to out-of-body experiences.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A remote horde of architectural treasures fit for Indiana Jones.