Kerið, Selfoss

Kerið is a striking volcanic crater located near the town of Selfoss, in the southern part of Iceland. This geological wonder is part of the country's famed Golden Circle route, and it is a testament to Iceland's volcanic history. The crater, which is believed to have formed around 3,000 years ago, is approximately 55 meters deep, 170 meters wide, and 270 meters across.

Unlike many other volcanic craters, Kerið is renowned for its vividly colored landscapes. The caldera itself is composed of red volcanic rock, which contrasts dramatically with the striking aquamarine waters of the lake that has formed in the crater's basin. This lake, which is roughly 7-14 meters deep depending on rainfall and other factors, owes its unique hue to minerals from the surrounding soil.

Kerið is easily accessible to tourists and has become a must-visit destination for those exploring Iceland's natural beauty. Visitors can walk around the rim of the crater, taking in panoramic views of the surrounding landscape. There is also the option to descend the steep slopes to the water's edge, allowing for an up-close experience of this natural phenomenon.

While Kerið is not as active as some of Iceland's other volcanic sites, it is significant in helping scientists and visitors alike understand the island's geothermal activity. In addition to its geological importance, the crater is also a cultural landmark; it has been used as a venue for music performances, taking advantage of its natural acoustics.