Beglik Tash is a Thracian rock sanctuary and observatory, located on the Southern Black Sea Coast, close to the town of Primorsko, at the foot of the mytical Strandzha mountain.

The place has been used by the Thracian tribes for performing religious ceremonies. There are a few huge rock formations- one of them resembles a Thracian sun clock; another one- a cave which is in the shape of  a woman's lap, and a third one is a huge rock, which stands only on two points. There is also a huge stone throne.

These are volcanic stones dating back to the Mesozoic Era.

The palce is an open air museum, and a guiding service is available at your request (recommended).