Mud volcanoes of Pâclele Mari, Geological nature reserve in Scorțoasa, Romania.
The Mud volcanoes of Pâclele Mari are geological formations where gases from deep underground push clay, salty water, and mud through surface vents to create cone-shaped mounds. These structures continue to release materials and gases in an ongoing process visible to visitors.
The site received official protection status in 1924 as a nature reserve, establishing early recognition of its geological value. International recognition came much later with its designation as a UNESCO geopark.
Local people call these formations the Gates of Hell because of the constant gas emissions and bubbling mud visible on the surface. Visitors can witness the ongoing activity and feel the strange, otherworldly character of the place.
Wear sturdy footwear because the ground is uneven and can be slippery from wet clay. Check conditions before visiting, as rain can make the site difficult to access safely.
The cold mud expelled from the vents naturally shapes itself into miniature cone-like mounds, but without any involvement of actual volcanic magma. This makes the site a rare example of active geology that operates completely independent of volcanic processes.
Location: Scorțoasa
GPS coordinates: 45.33919,26.70850
Latest update: December 13, 2025 13:36
The Earth offers a wide range of geological shapes shaped over millions of years by weather and the movements of the land. In Northern Ireland, thousands of basalt columns stand along the coast, leftover from an ancient eruption. In Arizona, the Colorado River carved out a canyon more than 400 miles...
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