A unique botanical garden housed in three giant geodesic domes.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

This striking art museum holds an amazing series of curiosity cabinets.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.

The former estate of the Guggenheims, part of the opulent Gold Coast that inspired the Great Gatsby.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

In the loving memory of a tragically deceased role-player this Illinois park is decked out with both dungeons and dragons.

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

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

Memorializing an American tragedy of massive proportions.

Penn State's giant bug collection.

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

This historic old movie house was the scene of one of the Blob's most iconic attacks.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

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

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

A beautiful oddities shop crammed with strange and morbid curiosities.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

A historic covered bridge is but one example of an oddly prevalent American urban legend.