Mt. Pinatubo crater lake, Philippines. Mt. Pinatubo was the last stop on our memorable Philippines trip. The crater lake is big and its unique unworldly blue color is due to sulphur content. The water is safe to swim in, as my friend demonstrated by diving in! #1 was shot from the place where people are standing in #2. It was noon and the skies are blown out and the multi-hued mountainous crater...