Castel Lagopesole is visible for several miles as you travel along the strada statale heading south towards Potenza as it sits one a hill above the small town of Lagopesole.
The castle was one of Federico II's several castles in this area including the one at Melfi to the north and Castel de Monte in Puglia. The castle has 2 courtyards but you can only visit one of them. Inside you can visit several restored rooms and the chapel. The museum displays are not very interesting nor provide much information. However it is only 1.5 euro per person to visit this interesting castle.
Well worth a quick detour off the highway.