Wrangel Island is an island in the Arctic Ocean, between the Chukchi Sea and East Siberian Sea. Wrangel Island lies astride the 180° meridian. The International Date Line is displaced eastwards at this latitude to avoid the island as well as the Chukchi Peninsula on the Russian mainland. The closest land to Wrangel Island is the tiny and rocky Herald Island located 60 km (37 mi) to the east. Wrangel Island may have been the last place on earth where mammoths survived.