A battle between nature and architecture in the Cambodian jungle.

Khmer Rouge's high security prison.

One of the biggest markets in Asia, under one of the continent's largest domes.

5,000 skulls in memorial to those killed by the Khmer Rouge.

This dangerous-looking suspension bridge may have been too unstable to remain open.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

A bedazzled house and crown "jewel" of outsider artist Loy Allen Bowlin.

One of Frank Lloyd Wright's final works was this UFO church.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

This striking art museum holds an amazing series of curiosity cabinets.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

A bizarre house filled with an astounding array of collections.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

The Iowa state contender for largest pan in the world oddly only comes in second or so.

This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

A unique botanical garden housed in three giant geodesic domes.

Robots, lasers, and whoopee cushions, oh my!

A house and yard adorned with bizarre concrete sculptures in a Milwaukee suburb.

A factory in Milwaukee where poop is reclaimed… and recycled.

A museum celebrating the self-taught artist-environment builder.