This national park, located in the extreme south-western tip of Java on the Sunda shelf, includes the Ujung Kulon peninsula and several offshore islands and encompasses the natural reserve of Krakatoa. In addition to its natural beauty and geological interest particularly for the study of inland volcanoes it contains the largest remaining area of lowland rainforests in the Java plain. Several species of endangered plants and animals can be found there, the Javan rhinoceros being the most seriously under threat.

The oldest and largest of the protected areas on the island of Java the boundary of the property encloses a very large area that is sufficient to protect its outstanding scenic, natural values as well as the important biodiversity values that warranted inscription on the World Heritage List. The huge volcanic mass of Krakatau dominates the property and is completely contained within its boundaries.

The property contains all the necessary habitat for the in-situ conservation of its unique biological diversity, including those habitats required to support the threatened species and other biota of outstanding universal value. While it is no longer possible to increase the size of the property, its location, in particular on the peninsula, provides managers with an ideal geographic unit for management.

A number of the component areas of the property are surrounded by buffer zones with activities in the zone given increasing attention in regards to regulation from the relevant provincial authority, with advice from the management agency. Poaching of the Javan Rhino has always been the main management issue and careful monitoring is required to ensure there is no illegal poaching of this critically endagered species as well as the other unique biodiversity contained and protected within the property.