The purpose-built Aquincum Museum, on the western edge of what remains of this Roman settlement, puts the ruins in perspective, with a vast collection of coins and wall paintings. Look out for the replica of a 3rd-century portable organ called a hydra and the mock-up of a Roman bath. Most of the big sculptures and stone sarcophagi are outside in the park. You can reach Aquincum on the HÉV or on bus 34 or 106 from Szentlélek tér.