Al-Jassasiya is one of the most interesting places in Qatar. Visitors of this site can admire lots of glyphs carved in stone. Its complexity varies from simple geometric shapes to complex "pictures" of animals.
There are many opinions regarding the age of the glyphs. In 15th century there was a settlement close the site, but many experts believe the carvings are much older. Others point out, that the rocks are very soft and can erode "quickly" and thus the glyphs have to be more recent.