The Iberian settlement at Puig de Sant Andreu d’Ullastret is the largest of its kind in Catalonia. It is considered to be a true city, the capital of the Iberian tribe that the ancient writers referred to as the indiketes. The earliest Iberian settlement in Ullastret dates from the first half of the 6th century BC, although there are earlier settlements dating from the start of the Iron Age. It is a walled hill-fort settlement which dominates the surrounding area.

The fort forms part of a larger archaeological site from the Iberian period in which another village has been discovered, a burial site and a series of smaller settlements scattered across the area.

A visit to the Iberian site of Ullastret is completed with a visit to the museum, where the most significant archaeological finds from the site are displayed.