Begun in 1277, this was the second of King Edward I's great Welsh fortifications. A protected river dock forms one side of the defences of this concentrically planned castle, dominated by a distinctive diamond-shaped inner ward.

• 16.6 miles - about 30 mins - [google map]
• 17.0 miles - about 5 hours 41 mins - [google map]
• http://cadw.wales.gov.uk/daysout/rhuddlancastle/?lang=en

Begun in 1277, one of the first castles to be built in Wales by King Edward I. Its most impressive feature is a solitary round tower, isolated from the rest of the inner ward. It features in Shakespeare's Richard II.

• 32.9 miles - about 44 mins - [google map]
• 32.4 miles - about 10 hours 55 mins - [google map]
• http://cadw.wales.gov.uk/daysout/flintcastle/?lang=en

Begun by Henry de Lacy in 1282, with the support of King Edward I, the site is dominated by an impressive triple-towered gatehouse, the link between defended town and castle ward.

• 24.0 miles - about 41 mins - [google map]
• 22.1 miles - about 7 hours 33 mins - [google map]
• http://cadw.wales.gov.uk/daysout/denbighcastle/?lang=en