the real volcano crater

Since I saw a photo of the Taal volcano on a post card or on my grade school Civics text book, I thought that it was this island/mountain.

However, during our volcano trip last April 13, our tour guide corrected this belief. Actually, according to him, the whole lake is the crater of the volcano. There is also a "main" crater but it's also not on this island. Most people probably thought that this was the main volcano because of the large crater in it. It really is a crater in every sense of the word, but it is not a volcano crater. The real volcano crater is located on the island with the circle.