HISS-STERICAL: Expect some fun and scary encounters at the city parks and zoo Halloween do. Picture: Leszek Szymanski / EPA

Activities will include animated scary movies, close encounters with snakes, as well as a visit to the animals of the Amazon with exotic spiders, bats, frogs, piranhas and anacondas,

Other fun activities will include jumping castles, trick-or-treat fun, face painting, candy floss and food.

There will also be scary characters walking about as well as a ghost-train ride.