In the early 1800s, surgery was also a show.

A rare view of a preserved Victorian science museum.

A layered tribute to the work of mosaicist Isaiah Zagar.

Prove you deserve to be fed by Kenny Shopsin.

New York's oldest magic store.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

Phil Mortillaro uses keys to bring art back to the Village.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Monasteries on rock pillars, once accessible only by frayed ropes.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

Famously misunderstood wonder of the ancient world

Notorious artist squat renovated into legal studios.

An enormous, inside-out glass globe built in 1935.

A hand-built folk art installation covered with messages of God's love.

The ghostly remains of an accidental sea.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

An eerie, derelict amusement park in Berlin.

A crumbling hospital from the 1850s on Roosevelt Island.

A bizarre house filled with an astounding array of collections.