Highlights rugged charm of an icelandic open air geothermal bath sample delicious icelandic food in a light buffet seeing the northern lights dancing across the sky learning about science and of northern lights the secret lagoon the secret lagoon is a natural hot spring and pool located near the village of flir in south iceland just off the golden circle route fed by mineral rich geothermal water from nearby hot springs at a steady temperature of 38 to 40 the secret lagoons po