- Cilacap is a regency and a town located in Central Java, Indonesia. It is situated on the southern coast of the island of Java, overlooking the Indian Ocean. Cilacap is known for its beautiful beaches and fishing industry. The city is also home to the largest oil refinery in Indonesia. Cilacap is a popular tourist destination, especially for those seeking a beach getaway or interested in exploring the natural beauty of Central Java. The city also has historical sites, such as Benteng Pendem (Pendem Fortress), which was built during the Dutch colonial era. Overall, Cilacap offers a mix of natural attractions, industrial sites, and cultural heritage.