Lake Ilopango is a large crater lake located in El Salvador. It was formed by a volcanic eruption around 2,500 years ago, creating a caldera that is now filled with water. The lake covers an area of approximately 72 square kilometers and reaches depths of up to 230 meters. The surrounding region is known for its natural beauty and biodiversity. Ilopango is a popular destination for outdoor activities such as hiking, fishing, and birdwatching. The lake also plays a significant role in the local ecosystem and provides water for nearby communities.