Penjaringan contains the remnants of the original mangrove forest of Jakarta, some of which are protected by the Muara Angke Wildlife Sanctuary.
Penjaringan District is criss-crossed with water-draining channels, canals, and water reservoirs to protect the land from sea flooding.
Another protected mangrove forest in the Penjaringan Subdistrict is the privately-owned Angke Kapuk Nature Tourism Park (99.82 ha), which was given by the Jakarta government to PT Murindra Karya Lestari in an attempt to rehabilitate the area back into its original natural state.
On January 5, 2012, the new Muara Angke marina opened to service passenger ships plying routes between the Thousand Islands and the mainland.
[2] Being a low plain coastal area, Penjaringan is constantly threatened by flooding from high tide.
[4] In 2008, seven dikes were installed within the district of Penjaringan to protect the area from increasing levels of sea tide.