Santa Ana Volcano
Known as the Quezaltepeque or El Boquerón the San Salvador volcano is a stratovolcano situated northwest of the city and is breathtaking.
I would suggest going on the half-day tour of the majestic volcano. It is absolutely beautiful and an incredible sight to behold as you hike to the summit and look out towards the Coatepeque Lake, Izalco Volcano, and Cerro Verde.