Teritip Crocodile Farm is a long-running wildlife stop outside central Balikpapan, known for crocodile enclosures and a family-day-out atmosphere. It is not polished ecotourism, but it is a recognizable local attraction for visitors with extra time in the city.
Go with modest expectations and consider how it fits with your own views on captive wildlife. Travellers more interested in natural habitat may prefer Balikpapan's protected forest and mangrove sites.