However, some can be, very valid reasons, and expensive to visit, these are usually ones that offer more facilities, events and are usually the larger, more intact castles. However, if you are visiting South Wales there are quite a few that are completely free to explore and make for a great family day out.

While Wales is known as the "Castle Capital of the World" with over 600 sites, most of the famous and well-preserved castles are not free. Major landmarks like Caernarfon, Conwy, Beaumaris, and Caerphilly are managed by Cadw (the Welsh government’s historic environment service) and require an entrance fee, which typically ranges from £8 to £12 for adults. However, there are several ways to see them for "free" or at a lower cost. If you are a member of English Heritage or Historic Scotland, you usually get half-price entry in your first year and free entry upon renewal. For those who want to see many sites, a Cadw Membership offers unlimited access for a year. Furthermore, many of the smaller, "ruined" castles—often those built by native Welsh princes rather than Edward I—are located on public land and are free to explore, such as Castell y Bere or Dolbadarn Castle. There is also an annual "Open Doors" event in September where many paid sites waive their fees for a weekend to celebrate Welsh heritage, allowing budget-conscious travelers to see the "Great Castles" without a ticket.