There is nothing like climbing/ Srambling up the North Face of Tryfan in the Snowdonia National Park.
You need to use you hands and feet to scramble and climb up to its peak at 918 meters.
You then have to do the same to climb to up Bristly Ridge and then into the peaks of the Glyders (Glyder Fawr 1,001m and Y Gam 947m). It takes a few hours but it's amazing fun.
There are great wild camping opportunities on the lakes at the base of both Snowdon and the Glyders. The park wardens tolerate wild camping as long as you leave it, as you found it.
I once found an unconscious man on the north face of Tryfan and kept him alive in space blankets and survival bags until mountain rescue and the helicopter could rescue him. He lived. We found a suicide note and an engagement ring in his pocket. He had taken a load of prescription drugs.