Zandvlei Park
The cache, a small flip-topped tablet pot, is hidden in Zandvlei Park, a free access grassy recreational area with some shady wind-blown trees at Lakeside on the west side of Zandvlei. It has braai and picnic facilities and, with ample space to relax and unwind, is a popular relaxation spot for children and adults, water sport enthusiasts and nature lovers. It is used for various activities including canoeing, sailing, windsurfing and fishing.
Opening hours: daily from 08:00-18:00 in summer (Sep-Mar) and 07:00-17:00 in winter (Apr-Aug).
To access the cache location, park at any convenient spot along Promenade Road which runs along the west side of the vlei.
Zandvlei is the only functioning estuary on the False Bay coast, and supports a variety of indigenous fish. Juvenile marine fish use the estuary as a nursery, where they can grow in safety. It is important that the estuary mouth is open for at least a part of the year, to enable young fish to enter the estuary and older fish to return to the ocean.
It is opened artificially by the City of Cape Town’s Catchment Management Department when a high spring tide is expected (see here). Southern mullet or Harder (Liza richardsonii), leervis (also known as garrick or leerfish; Lichia amia), the critically endangered white steenbras (also known as pignose grunter; Lithognathus lithognathus), white stumpnose (Rhabdosargus globiceps) and elf (Pomatomus saltatrix) are among the 25 types of fish found in the estuary (see Gallery).
Anglers are encouraged to remove alien invasive fish species, such as common carp (Cyprinus carpio) and barbel (also known as sharptooth catfish; Clarias gariepinus).
Wetlands like Zandvlei are important habitats for birds, both those that live here all year and those that migrate from Europe, Asia and other parts of Africa. About 150 species have 
been recorded here, including great crested grebe (Podiceps cristatus), African fish eagles (Haliaeetus vocifer), Caspian terns (Sterna caspia), ducks, coots, herons, ibises, pelicans, kingfishers, swallows and weavers.
18 different reptiles have been recorded in the Zandvlei Nature Reserve at the north end of the vlei, including the marsh terrapin (Pelomedusa subrufa), brown water snake (Lycodonomorphus rufulus) and mole snake (Pseudaspis cana), as well as 210 different plant species. Residents of neighbouring Lakeside (on the west side of the vlei) and Marina Da Gama (on the eastern side) enjoy the sound of birds and the croaking of frogs. They sometimes see Cape clawless otter (Aonyx capensis), porcupines (Hystrix africaeaustralis) and small grey and water mongoose (Galerella pulverulenta and Atilax paludinosus), whilst their gardens are often visited by Cape dune mole rats (Bathyergus suillus).
Farming, urban development, invasive alien plants and dredging of the vlei have destroyed much of the natural vegetation around Zandvlei. The City of Cape Town, Working for Wetlands, and volunteers from the area are slowly restoring the natural Cape Flats dune strandveld vegetation. They collect indigenous plants before bulldozers create new developments, and transplant them at Zandvlei. The extensive reed beds are an important part of the river, as they filter out silt and remove nutrients so that the water does not become thick and green with algae. The invasive water hyacinth (Eichhornia crassipes) is a recurring problem, as it clogs large areas of the vlei.