A former copper mine which became a truly unsuccessful prison.

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

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

Underground tunnels remain beneath this abandoned mental asylum.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

The kind of mixed-up place that drives archaeologists crazy.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

A wunderkammer hidden on the top floor of the Hartford statehouse.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

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

A safe space and resource for anything and everything relating to sex and sexuality.

250-year-old farm now features sculptures, a petting zoo and a hippy-bazaar.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

A former zoo turned public park, where visitors can hang out in the old animal cages.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

The summer home and later final residence of acclaimed American sculptor Augustus Saint-Gaudens.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

Former abode of notable poet, complete with literary references and stories of ghosts.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

Around 100 sculptures from artists all over the world decorate the hiking trails surrounding this locale.

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