Crater lakes are formed in volcanic craters, also called calderas. After major eruptions groundwater circulation, rain or melted ice fill the craters with water. Sometimes crater lakes are also referred to as volcanic lakes. Their color depends on the temperature ...

Today the list of UNESCO sites consists of more than 1,000 unique and spectacular places, and the list is getting longer each year. From the ancient ruins to the breathtaking ecosystems, there are many remarkable places worth visiting. They have a special ...