The Sacro Bosco, colloquially called Park of the Monsters, also named Garden of Bomarzo, is a Mannerist monumental complex located in Bomarzo, in the province of Viterbo, in northern Lazio, Italy.

Bomarzo is a town and comune of the province of Viterbo, in the lower valley of the Tiber. It is located 14.5 kilometres (9.0 mi) east-northeast of Viterbo and 68 kilometres (42 mi) north-northwest of Rome.