Three floors on the city from the medieval walls to the Claddagh and the Hookers, beside the Spanish Arch. Home of the oldest known Claddagh ring. Free.

Footings of the de Burgo hall of about 1300, found under the Revenue office in 1997 and left open under glass. Five minutes, free.

The 1850s tower that watched for salmon poachers on the Corrib, now a small museum on the river and its fishery. Free.

The smallest museum in the city, the childhood home of James Joyce’s wife, off Shop Street. Seasonal opening.

At the back of the oldest Claddagh ring makers, some of the earliest rings and the story of Richard Joyce. Free, ten minutes.

Forty years of machines from the first home computers to the telegraph, at the Insight centre on the Dangan campus. Open days and by appointment.