El Morro is one of several Spanish forts still standing in Old San Juan, Puerto Rico. The fort is part of the U.S. National Park Service and is open daily for walking tours. El Morro is located on a cliff on the far end of Old San Juan which gives way to beautiful vistas of the Atlantic Ocean. It/s an easy walk (or short cab ride) from the cruise ports - a must see if you/re passing through San Juan Puerto Rico.