There is an archaeological secret in Jordan - the Great Circles. These huge structures are made of stone walls only 1-1.5 meters high and about 400 meters in circumference.
They were first discovered in the 1920s, but as recently as aerial photography became widespread, scientists began to take an interest in these obscure structures. There were no holes in the circles, so people had to jump over low stone walls to get inside.
Even today, experts still do not know when the circles were built, who built them, or why it was done. However, based on artifacts found near these structures, archaeologists have suggested that they were built at least 2,000 years ago.
Other experts have suggested that the circles may even be much older.
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