A former copper mine which became a truly unsuccessful prison.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

Small rustic cabin nested in the mountains of Killington, Vermont.

This "common-as-dirt" museum celebrates the glory of normalcy.

A beautiful, creepy 19th-century castle stands incongruous in rural Vermont.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

A crumbling hospital from the 1850s on Roosevelt Island.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A terrific purveyor of natural history objects and curios.