Jane Love
Google
Fabulous place,  wear good comfortable shoes there are lots of steps which are obviously, old,  worn,  wet,  steep, narrow etc but worth the climb up the towers,  museum in one part, lovely new sculptures dotted about the place.  Little outdoor cafe area for drinks,  sandwiches and cakes which is very reasonably priced,  2 coffees and 2 cakes for £10.  We were there over 2 hours but could have spent more time, if you only want to go up a couple of towers do 2 at opposite ends to get different views and perspectives. Little shop sells lovely locally handmade items as well as usual Cadw/English Heritage pencils etc. Well worth a visit and Caernarfon town looking good too, especially the area within the castle walls.  Car park is in the shadow of the castle,  see pictures for price,  public toilets in car park as well