This popular day trip from Ploiesti heads up the scenic Prahova Valley to the mountain resort of Sinaia, taking in the magnificent Peles Castle, the historic Sinaia Monastery and the alpine scenery of the Bucegi Mountains. With transport and a guide, visitors explore the royal palace and the town before returning to the city. Combining architecture, history and mountain landscapes, it is one of the most rewarding excursions from the Ploiesti area.