Complete the following sentence: A large crater lake, called Heaven Lake, is in the caldera atop the mountain. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️
1257 eruption of Mount Samalas near Mount Rinjani and the 1815 eruption of Tambora).