Hidden

The signs of a long buried road can still be found hidden beneath a London sewer grate.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

This historic Jewish cemetery sits right in the heart of a Detroit car factory.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Half-drowned wooden stumps and stone blocks are all that remain of a Victorian landing that was destroyed by storms.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Travelers exchange letters with woodland creatures at this mini post office.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

The world's first aircraft factory has been hiding inside an automobile plant for almost 80 years.

The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.

The famous facade of Grand Central Terminal hides a regulation tennis court—and it's not the first one.

A New York garbage depot holds a secret collection of weird and wonderful refuse.