There's also an attraction finder, or just type in your town or city for a whats on guide. A very good guide to UK attractions and equally impressive design. Search by town, region or category. Get information of top events across the world. Select your region then a couple of categories for suggested days out.
Good information is shown on listed attractions.
A very effective site with some coupon offers. The official site of the British Tourist Authority. Details of lots of days out here. These 2 sites are related. The first is a great guide to enjoying a trip to Wales and the second a search engine for events in Wales.