underwater ruins

Lake Michigan Stonehenge

(image via: io9 )

A group of researchers using sonar to look for shipwrecks at the bottom of Lake Michigan got quite a surprise when they found what appears to be an ancient Stonehenge-like structure 40 feet beneath the surface of the water. Some of the stones are arranged in a circle and one appears to show carvings of a mastodon. The formation could be as much as 10,000 years old, which is coincident with the post-Ice Age presence of both humans and mastodons in the area. Michigan already has petroglyph sites and standing stones .

Underwater Ruins in Japan

(images via: Hottnez )

On the southern coast of Yonaguni, Japan, lie submerged ruins estimated to be around 8,000 years old. Though some people believed that it was carved by geographic phenomena, it’s now confirmed to be man-made as the intricate stairways, carvings and right angles suggest. It was discovered in 1995 by a sport diver who strayed too far off the Okinawa shore with a camera in hand.

Submerged Wonders of Alexandria, Egypt

(images via: WebUrbanist)

From WebUrbanist: “Off the shores of Alexandria, the city of Alexander the Great, lie what are believed to be the ruins of the royal quarters of Cleopatra. It is believed that earthquakes over 1,500 years ago were responsible for casting this into the sea, along with artifacts, statues and other parts of Cleopatra’s palace. The city of Alexandria even plans to offer underwater tours of this wonder.”