There have been two different Wells of Eternity. The glowing, swirling pool known as the First Well of Eternity (usually just called the Well of Eternity) was once a lake containing immense arcane energy. It was originally located on the ancient continent of Kalimdor near the ancient night elven city of Zin-Azshari. The present area where the First Well of Eternity was located became the Maelstrom after the Great Sundering following the War of the Ancients.