Rabaul Caldera is a large volcanic caldera located in Papua New Guinea. It was formed by a series of explosive eruptions, with the most significant event occurring around 1400 years ago. The caldera is home to several active volcanoes, including Tavurvur and Rabaul, which have erupted multiple times in the 20th century, impacting the surrounding area. The caldera is surrounded by a picturesque landscape, featuring lush vegetation and a natural harbor. It is also known for its rich cultural history, with the indigenous Tolai people residing in the region. Today, Rabaul serves as a reminder of the powerful geological forces at work in the Pacific Ring of Fire.