CONWY
Why is Conwy hidden gem? Conwy offers many places, activities, sights and lovely walks which you shouldn't miss. Conwy provides a wide range of activities for the whole day. It's a little town with a castle and its centre is surrounded by the town walls where you can have a lovely walk but it doesn't end there. Several nature hikes are available, you can visit the harbour where is also situated the smallest house in Britain, great restaurants (or just take away places) with delicious fish&chips, boat rides and little middle age (souvenir) shop guarded by the knight located next to the castle across the street.
I lived in Llandudno over a year and during this time I visited Conwy more than 10 times where I always discovered something new I didn't know about. It's better to have at least the whole afternoon so you can visit most of the activities and don't need to be in a rush.