The park's 120.551 hectares are divided into 76.214 ha of land and 44.337 ha of surrounding reef and sea. It can roughly be separated into three areas: the triangular shaped Ujung kulon Peninsula, the Gunung Honje Range to the east of the peninsula's isthmus and the island of Panaitan to the northwest. The highest points in the park are the 620 meters Gunung Honje, the Gunung Payung Range peaks of up to 500 meters and Panaitan Island 's Gunung Raksa at 320 meters. In the central section of the Peninsula is a large region of wilderness known as the Talanca Plateau which reaches 140 meters above sea level, however most consist of low rolling terrain seldom more than 50 meters above sea level.
The park surrounded by unusually warm water, seldom varying from between 29C to 30C. The coastlines of the park are molded by the sea around them, battered by Indian Ocean; the long sandy beaches of the south coast are backed by dunes, lagoons and forest broken by rocky outcrops a wild and wind swept shore line.The west coast's reef-lined shore has cliffs, promontories and towering sea-stacks along sand and boulder beaches overhung by forest, creating the most spectacular coastline in the park.On the north coast, the sheltered tropical straits lap upon beaches of white sands and coral banks with islands, estuaries, swamps and forest lined shores.Along each coastline is variety of seascape which in all their diversity, offer a wide range of absorbing shoreline experiences.