 The Grotte di Oliero is a series of caves housing the springs of this short river.As part of the Parco Naturale delle Grotte four caves can be visited on paths through the park.The main cave of the park is Grotta Parolini, originally called Covolo dei Siori ("Cave of the Lords"), later renamed Grotta Parolini in honour of its first explorer Alberto Parolini (1822).