The 16th century castle (originally built in 1031) is a huge stone building that looks almost impenetrable from the exterior, as it should. It has been well preserved and you will see watch towers and battlements that would have been used to spot invaders. It's now both the town hall and a museum that showcases works by Belgium painter Pol Mara - open to the public daily. It also hosts temporary exhibitions every year.
The Village des Bories is an ancient settlement (archaeologists are divided on its date of origin), of dry stone huts that were probably used as shepherds huts during the 19th century. It is located 1.5km from Gordes and is open to the public throughout the year. You'll find a small museum and you can take guided tours if you book in advance - ask at the tourist office.
Also close by to Gordes is the wonderful Cistercian Abbey Senanque which is well worth a visit. The Museum of Glass and Stained Glass lies a few kilometres south of Gordes by Saint Pantaleon and displays ancient glass beads, tiles, jewellery and other objects of both practical utility and beauty. Open throughout the year (closed Tuesdays), you can take tours in French, English and German. An old olive mill is located on the same site.
The Caves of Saint Firmin give you a glimpse into the underworld that was part of the defensive position of Gordes. The network of cellars under the Palais St Firmin have been partly excavated and you can now visit some of the chambers beneath Gordes.