Lake Nicaragua (sometimes referred to as Lake Cocibolca) is Central America's largest lake and the 10th largest body of fresh water in the world. A number of attractions set Lake Nicaragua above other lakes around the world. Lake Nicaragua is one of the only freshwater bodies of water with sharks. The Nicaragua Sharks, or Bull Sharks inhabit the depths of the lake and are a rare sight for the devoted tourist. Mombacho Volcano towers over this body of water and the collection of small islands known locally as Las Isletas scattered within the lake are believed to have been the result of a volcanic eruption thousands of years ago. The eruption spewed massive rocks out into the lake, which later became 'Las Isletas'. Visitors to Lake Nicaragua can hire a boat and tour the islands while taking in the spectacular scenery and multitude of bird and aquatic life. The lake is also home to the volcanic Ometepe Island with its twin volcanic peaks.