If museums are on your list of things to see in Karditsa, then you might want to head to Club of Photography and Cinematography. If you want to experience more of the culture Karditsa has to offer, head to Castle Panigirakis and Karditsa Stadium.
Sightseeing doesn't have to be expensive. You if want to get outdoors, try a visit to Lake Plastira or make a stop at attractions like Castle Panigirakis. Be certain to include a visit to Pafsilipo Park.