Genovesa, the "horseshoe" island, is situated to the north east of the Galapagos Archipelago group. It is also commonly known as "Bird Island" and was named after the Italian city of Genoa, in honour of the famed explorer, Christopher Columbus.
The island is estimated to have been formed nearly 2 million years ago by the then volcanic activity. In the course of time, one side of the caldera collapsed, letting in the sea to form what is now called Darwin Bay.
There is also an inland, saltwater lake called Lake Arcturus. It has a crater spanning over 600 metres in width at the rim, before dropping 60 metres down to the lake.