One of the liveliest squares in Rome, the Piazza Navona, built in the 1st century AD, was once the site where the ancient Romans went to watch the agones (games). It is not surprising that the square somewhat resembles the open space of a stadium. Gape at the famous Fontana dei Quattro Fiumi, otherwise known as the Fountain of the Four Rivers - a grand masterpiece by Benini that depicts muscular personifications of the four rivers: Nile, Ganges, Danube and Plate, and is topped by the Obelisk of Domitian. Be amused by the Fontana del Moro which has a basin and four Tritons sculpted by Giacomo della Porta (1575). Or perhaps see the captivating battle between Neptune and a sea monster, surrounded by sea nymphs at the 19th-century Fontana del Nettuno. Regardless, all these are masterpieces which you should definitely take photos of.