Trölladyngja

Trölladyngja is a volcanic crater in the Krýsuvík volcanic system in southern Iceland, rising about 378 meters above sea level. The structure contains a fissure vent and is surrounded by lava fields and geothermal features that reflect the active volcanic heritage of the region.

The crater formed through volcanic activity along the Mid-Atlantic Ridge and contributes to Iceland's ongoing geological development. The area shows evidence of multiple eruption episodes that have shaped the landscape over time.

The name Trölladyngja comes from Icelandic mythology and refers to troll stories tied to this location. Today, the area offers hikers a chance to experience the raw volcanic landscape and feel the power of nature firsthand.

Marked hiking trails lead from Grindavíkurbær to the crater, with proper footwear and hiking gear required. The terrain consists of rough lava fields with uneven surfaces, so walking carefully and watching your footing is important.

The Sog valley nearby contains active steam vents that show geothermal activity continues beneath the surface today. Visitors can observe these warm outputs from the ground and experience the power of volcanic heat directly.