It houses the Locksmith Museum. Opening hours:
Monday to Saturday, continuously from 9.30 am to 7 pm.
Sundays and bank holidays, 9.30 am to 3 pm.
In winter, closing time will be dependent on daylight (last access 20 minutes before closing).
On rainy days, the Towers will remain closed for safety reasons.
Tickets: €2 or €1 for groups, students, pensioners, large families and children over 7. Free entry on Sundays and public holidays.