Ringing Rocks Park, Bucks County, Pennsylvania.

A big field of metallic boulders that actually ring when struck.

Some think this area might make a good gateway to the land of the elves.

I mean, you never know.

Fire Hydrants of the Mojave Desert. From FireHydrant.org.

See also Fire and Water, paintings of fire hydrants by Anna L. Conti, on display at the Canvas Gallery in San Francisco.