If museums are on your list of things to see in Trujillo, then you might want to head to Museo Riveras del Pedregal. If you want to experience more of the culture Trujillo has to offer, head to National Park Calentura Capiro and Fortaleza de Santa Barbara.
Sightseeing doesn't mean you have to blow the budget. For some things to do in Trujillo, enjoy the outdoors at National Park Calentura Capiro or Laguna Guaimoreto. Be certain a visit to Fortaleza de Santa Barbara is in your plans.