Postojnska jama d. d. has a long experience, dating back to 1819, in running and managing caves tours and events. In 1990s the company converted into a public limited company and it is currently owned by the Batagel & Co. d.o.o. Postojna (74.9%) and by the Municipality Postojna (25.01%). Postojnska jama d. d. has great experience in: - managing natural and cultural heritage sites (caves: Postojnska jama, Pivka jama, Črna jama, Otoška jama, Jama pod Predjamskim gradom and Predjama castle); - international marketing; - individual and group visits organization (650 000 visitors per year); - event organizing; - providing catering in restaurants, souvenir shopping and hotel accommodation in Postojns city. Cave Postojnska jama and castle Predjama are world famous attractions and the biggest tourist attraction of Slovenia with 35 million visitors since 1819. Postojnska jama d. d. has 150 employees.