Probably built by Llywelyn ab Iorwerth ('the Great') early in the thirteenth century, the castle is dominated by a massive round-towered keep, still standing up to 50 feet (15.2m) high.
1 April 2011 - 31 March 2012
Daily 10.00am - 4.00pm
Last admission 30 minutes before closing
Closed 24, 25, 26 December and 1 January
Adult - Am ddim/Free
Family - Am ddim/Free
Senior citizens, students and children under 16 - Am ddim/Free
Disabled and companion - Am ddim/Free
Road 1/2m (0.8km) SE of Llanberis, on A4086
Rail Bangor 9m (14.5km).
For further information, please contact: Traveline Cymru on 0871 200 2233 or National Rail Enquiries on 08457 48 49 50.