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Hisarya, a Thracian cult, is located on the Hisarya ridge in eastern Rhodope near the village of Senoklas. The archaeological site includes a Thracian cult center with rock sanctuary, rock niches, rare rock suns and the ruins of a large Thracian and medieval fortress.
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The Deaf Stones Rock Sanctuary is one of the largest Thracian cult monuments. It consists of several large boulders, in which deep chambers are carved. In the boulder in the east, a staircase has been carved, which leads to the summit. The remaining three rocky peaks are dotted with more than 200 religious niches.
The Thracian sanctuary is one of the most imposing megalithic monuments discovered on the territory of Bulgaria. The sanctuary is a massive rock structure and its top is a truncated pyramid. The complex comprises two sarcophagi, a rectangular bed for the main altar, and a 3-m-deep well. It dates back to the end of the 5th and the beginning of the 4th centuries BC.
An archaeological site with monumental megalithic structures, dating back from the Bronze Age and is considered to be the largest megalithic archaeological site in all of Bulgaria.
The stone mushrooms are a rock phenomenon near the village of Beli Plast. They reach a height of 2.5–3 m.
Turtle-like reliefs, cut in the rocks by an ancient culture. Largest is 7x5 m.
Utroba Cave
This Thracian megalith, the Womb Cave (Cult complex “Utroba cave” Тракийско светилище Пещера Утроба) is located near village of Ilinica. The temple is shaped like the opening to a vagina. It leads into a 22-m deep cave. At the end of the cave, a carved altar (1.3 m in height) symbolises the womb itself. At midday as the sun approaches its highest point, the sun light seeps into the cave through a special opening in the ceiling and projects a perfectly recognisable representation of a phallus onto the floor. As the sun progresses further, and the light slants across the interior of the cave, the phallus grows longer, reaching out to the womb altar. Only during some months of the year, when the sun is lowest on the horizon, the phallus becomes long enough to reach the altar and symbolically fecundate the womb. A well marked tourist route exists through Enchec village and around 300 m after mountain cottage “Borovica”. The way to the cave includes around an hour of walking up. The path is steep but with three big alcoves and a shelter right under the cleft of the cliff. Local people know the place as Dangardak kaya (The echoing stone). Today childless couples visit the Womb cave to gain a long-awaited child.