Perhaps the most important historic archive in Europe, many important historic treaties were once signed in this intimate, fortified complex. A short journey from the city centre, the castle is free to enter, and offers tours to help guests better understand the historical significance of each room.

Further inland, in the southern part of the island, lie the so-called masticochoria (mastic villages). These well-preserved, fortified villages date from the 14th-16th centuries and were centres for the cultivation of mastic. Mastic is the sweet-tasting gum of the lentisk bush, which was exported all over the Mediterranean – and the area still produces around 300 tonnes of mastic every year. The most picturesque villages are Pyrgi, with its houses decorated in black and white geometric patterns called xysta Mesta, where towers and walls surround a baffling labyrinth of village streets as well as Olympoi and Vessa are all a worth a visit.

Inland from the town lies the fertile plain of Kambos, an area of olive groves, citrus orchards, almond trees and patchwork fields divided by stone walls and country lanes. Under the Giustiniani, this rich hinterland was the domain of wealthy Genoese landowners and many of their substantial stone mansions can still be seen – some have been turned into holiday homes by wealthy Athenians, while a few have been converted into comfortable guesthouses.