While I was on vacation, I was able to take a mini trip up to Taff's Well. It's easily accessible from Cardiff. There are buses but I find the easiest way to get there, if you don't have a car, is by train from the Queen street station (it also stops at Cathays and Llandaff North). It only takes about 15 minutes from the heart of Cardiff.
Taff's Well is a very cute village. It's name is derived from it's location next to the river Taff and it's history of being a site of natural hot springs since Roman times. It is a great place to spend an afternoon or day. The local pub is great and it's nice to just walk up the Taff trail and take in the Welsh countryside.
While in Taff's Well, I definitely recommend visiting Umber & Sienna Art Café. It's an easy, short walk up the Taff trail and a great little place to see some local Welsh art. Have a tea or coffee and a slice of delicious homemade cake (or other tantalising treats!) while enjoying an environment filled with local artwork. If you have children, bring them too. There are child-friendly snacks and drinks available and they will love creating their own Lego® artwork on the walls!
The owner of the café, Rachael, has done an excellent job of arranging the place and will be happy to make you feel welcome. The café is open 9:30-3 pm Tuesday to Friday and 10-5 on Saturdays.
How to get there in a 5 minute walk
Across the road from the Taff's Well train station car park, you will see the Taff Trail. Follow it (north) over the bridge and to the first gate. At the first gate, you will see two cottages, one on the left and on the right. These are the Rhymney railway cottages (so-named after the Rhymney Valley railway connection).
After the cottages, you will come to a second gate. Just after this, on the left hand side, you will see a little track and a sign pointing you to the art café.