The ancient Romans built the seaside Croatian town of Split more than 1,700 years ago, and much of it has survived. Sign up for a guided walking tour or simply wander through the Old Town’s labyrinth of cobblestoned streets that wind past churches, ancient temples, and town squares. The Riva, Split’s waterfront promenade, is best for views, or walk to the lush Marjan Hill and discover several ancient churches, including the 8th-century St. Jure.