The collection of ceremonial and cultural objects spans many countries and hundreds of years.

A museum dedicated to exhibiting remarkable outsider art.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Nature and beauty amidst pollution and industrial wreckage.

An urban laboratory.

Deep scars on the earth left by the Ice Age.

An office built to look like a giant basket.

Former laboratory of radical psychiatrist Wilhelm Reich.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

One of only two commuter aerial tramways in the United States.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Giant, friendly pelicans in Central London, the most unlikely of places.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.