Elevated freight railway turned wildly successful urban park.

A giant Troll lurks under one of Seattle's oldest bridges.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

America's most famous piece of self-built architecture.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

A layered tribute to the work of mosaicist Isaiah Zagar.

A battle between nature and architecture in the Cambodian jungle.

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

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

The ghostly remains of an accidental sea.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

These azure waters were thought to lead to the Mayan Underworld.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

The masses at this church incorporate enough moonshine and animal sacrifice that they are no longer recognizably Catholic.

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

Semi-recognized center of the world, with many oddities.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

Red Hook's massive public pool, built by Robert Moses.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”