Pinatubo is a stratovolcano located on the island of Luzon in the Philippines. It is part of the Zambales Mountain Range and is known for its significant eruption in June 1991, which was one of the largest volcanic eruptions of the 20th century. The eruption released a massive amount of ash and gases into the atmosphere, affecting global temperatures and air quality. The eruption of Pinatubo led to the evacuation of thousands of residents and caused widespread destruction in nearby areas. The volcanic activity also created a large caldera, which is now filled with water, forming Pinatubo Lake. Today, it is a popular destination for hikers and tourists interested in its natural beauty and geological significance.