Two of the most important archaeological sites on the island are the Cave of the Guanches, where the oldest remains in the archipelago have been found, dating to the 6th century BC, and the Caves of Don Gaspar, where the finding of plant debris in the form of carbonized seeds indicates that the Guanches practiced agriculture on the island. Both deposits are in the town of Icod de los Vinos. Also noteworthy on the island is the Estación solar de Masca ("Masca Solar Station"), which was an aboriginal sanctuary for the celebration of rites related to fertility and the request for rainwater. This is located in the municipality of