Giglio Porto, situated on the eastern side of the island, is the disembarkation point for  boats and ferries that make their way here from the  Tuscan mainland.  The town, originally consisting of only fishermen's cottages now extends beyond the port. Much of its character comes from its  promenade and the roads that lead to the picturesque Piazza della Dogana (customs), which acts as the island's open-air salon.

Amongst various monuments of historical interest, the  Saracen Tower which dates back to the Middle Ages and the Church of the Madonna del Giglio, stand out.

Giglio Castello is situated on the highest inland point of the island's central area. A medieval town, it is characterised by the imposing Rocca Aldobrandesca (fortress). an integral part of the castle complex, and  the  well-preserved walls  and a few towers typical of that period.  The historic  centre of town is home to two churches,  St. George's and St. Peter's, the latter of which safeguards the "treasure" of Pope Innocent XIII and a magnificent  ivory  crucifix by Giambologna.

The island's diving areas:
The island is very popular with scuba divers and is often described as one of their favourite places in Italy. It is known for its easy dives suitable for those with less experience and in particular for the spectacular red horny-coral visible at depths over just 35 meters and for the rich marine life that surrounds it including such rare species as the Astropartus Mediterraneneus, commonly known as basket starfish.