There is a great walk you can take from Aberystwyth up one of the hills surrounding the town. The hill is called Pen Dinas and is the site of an Iron Age Hill Fort, complete with earthworks. It is recognizable from town by the memorial placed on top in the shape of a cannon (celebrating the victory over Napoleon).
To get there you walk south on Bridge Street over the Trefechan Bridge and continue south on Penparcau Road, keeping on the right side of the street. The road will start up a hill and there will be a driveway to your right. Follow the drive a few steps to the trail head to Pen Dinas. It is a delightful walk between hawthorn hedges to a gate that leads to the top of the hill.
Spectacular views of Aberystwyth, Penparcau, Blaendolau and Cardigan Bay. Often very windy, so dress accordingly. Years ago you had to run a gauntlet of Welsh ponies (after the first time I always brought apples) to get up there, but they have since passed on. A lovely place for a picnic or just to sit and contemplate the beautiful Welsh countryside.