Stonehenge may be the most well-known stone circle in the world, but it certainly is not the only one. WebEcoist has compiled a list of 13 others which you may not know about.
Lake Michigan Stonehenge: Lake Michigan, USA
Just a stone’s throw away (or drop) from Beaver Island’s stone circle is another Lake Michigan mystery: what may be an underwater Stonehenge-like structure. Forty feet beneath the waters of Lake Michigan, this enigmatic stone circle consists of stones which seem to bear carvings of mastodons, proving that the structure is man-made. Research is still being conducted on the site, which is understandably difficult for scientists to see up close.