Isola Tiberina
In imperial times, Romans sheathed the entire island with marble to make it look like Aesculapius's ship, replete with a towering obelisk as a mast. Amazingly, a fragment of the ancient sculpted ship's prow still exists. You can marvel at it on the downstream end of the embankment. Today, medicine still reigns here. The island is home to the hospital of Fatebenefratelli (literally, "Do good, brothers"). Nearby is San Bartolomeo, built at the end of the 10th century by the Holy Roman Emperor Otto III and restored in the 18th century.
During summer, the island hosts an outdoor cinema, while its walkway is dotted with white tented bars and pop-up eateries.