May 21, 2018, 2:50 p.m. by Catie Leary
Composed of loose, gravel-like sediment and averaging about 6 feet in height, the puzzling natural mounds are a surreal sight.
In the Green Room: Performing at the Fortune Brainstorm: Green
April 30, 2009, 10:12 a.m. by Nick Scott
Video: Watch Chuck perform at the Fortune Brainstorm: Green.