Trash escaped from a landfill to fill beaches with all kinds of treasure.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

The world's largest piece of copyrighted artwork.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The world's longest known cave system.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

The largest self-built castle in the U.S., six decades in the making.