The Georgia Guidestones is a granite monument in Elbert County, Georgia, USA. A message clearly conveying a set of ten guidelines is inscribed on the structure in eight modern languages, and a shorter message is inscribed at the top of the structure in four ancient languages' scripts: Babylonian, Classical Greek, Sanskrit and Egyptian hieroglyphs.
The structure is sometimes referred to as an "American Stonehenge." The monument is 19 feet 3 inches (5.87 m) tall, made from six granite slabs weighing 237,746 pounds (107,840 kg) in all. One slab stands in the center, with four arranged around it. A capstone lies on top of the five slabs, which are astronomically aligned. An additional stone tablet, which is set in the ground a short distance to the west of the structure, provides some notes on the history and purpose of the Guidestones.
In June 1979, a man using the self-confessed pseudonym Robert C. Christian approached the Elberton Granite Finishing company on behalf of "a small group of loyal Americans", and commissioned the structure. The monument was unveiled on March 22, 1980
More information, including details of the inscriptions and other information, on the Wikipedia page