Apenheul Primate Park is a zoo in Apeldoorn, Netherlands. It specializes in apes and monkeys. It opened in 1971 and was the first zoo in the world where apes and monkeys could walk around freely in the forest and between the visitors. It started with just a few species, now it displays more than 30 different primates, among them bonobo, gorilla and orangutan.
In summer 2011, three adult male proboscis monkeys joined the collection from Singapore Zoo to commemorate the zoo's fortieth anniversary. They are the only known living specimens outside Southeast Asia.
Apenheul Primate Park was conceptualised by photographer Wim Mager in the 1960s, when it was legal for private citizens to own monkeys. Mager, who himself had several monkeys as pets, believed both humans and primates would benefit from housing the animals in a more natural forest-like environment. He created the apen-heul (from apen meaning monkeys, and heul, an old Dutch word for a safe haven).