Thingvellir National Park is a site of cultural, historical and geological significance in Iceland. Thingvellir is the visible site of the Mid-Atlantic Ridge and is one of the only places on earth where visitors can see the meeting of the North American and Eurasian tectonic plates. The plates are being pulled apart (at a rate of nearly an inch per year), creating the Thingvellir Rift Valley. This continental drift can be seen in the cracks and faults which traverse the region. In addition, there are several other areas of geological interest including Oxarafoss waterfall (near the end of Almannagja), Lake Thingvallavatn (Iceland’s largest natural lake), numerous lava fields and extensive moss-laden lava ravines.