This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

Over 1,000 pieces of one of the most niche art objects imaginable: the glass paperweight.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

A Museum of Holography frozen in 1974.

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

One Austrian's singular yard is now preserved as a folk art garden of concrete wonders.

A bizarre house filled with an astounding array of collections.

The only Frank Lloyd Wright-designed structure in the architect's hometown.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

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