The Sacro Bosco ("Sacred Grove"), colloquially called Park of the Monsters (Parco dei Mostri in Italian), also named Garden of Bomarzo, is a Mannerist monumental complex located in Bomarzo, in the province of Viterbo, in northern Lazio, Italy.

The garden was created during the 16th century. Situated in a wooded valley bottom beneath the castle of Orsini, it is populated by grotesque sculptures and small buildings located among the natural vegetation.