This full day Bari shore trip is built for guests who want the region's three signature stops in a single outing: the historic center of Bari, an underground cave system, and the trulli town of Alberobello.
The day starts with a walking tour through Bari's old town, a former Bronze Age promontory settlement whose maze of narrow alleys still opens onto sudden sea views. You pass the Basilica di San Nicola, built to house the relics of St. Nicholas after Bari sailors brought them from Myra in 1087, and the Norman Castle, the largest building in the region, reshaped over centuries with medieval and Renaissance additions. Nearby, the Cathedral of San Sabino, raised in the 12th and 13th centuries over an earlier Byzantine church, holds its namesake saint's relics in a crypt supported by 28 Byzantine and Romanesque columns.
From Bari you head inland to the Caves of Castellana, discovered in 1938 by the speleologist Franco Anelli after centuries in which locals avoided the site over stories of monsters living underground. The system runs more than 3,300 meters (2 miles) in length and drops to about 122 meters (400 feet) below the surface, and you descend through chamber after chamber of stalactite and stalagmite formations shaped over millions of years, some colored by iron and copper in the surrounding rock, others startlingly pale where the mineral deposits are purer.
The day finishes in Alberobello, a hillside town built almost entirely of trulli, the region's whitewashed, cone-roofed stone houses. Their construction is tied to a historical theory involving heavy Middle Ages house taxes: dry stone walls, built without mortar, could be dismantled quickly to dodge inspection, and the style stuck long after the tax pressure eased. You have free time to step inside a trullo, where a single room beneath the conical roof is typically furnished with simple olive wood pieces, and to walk the old town's two historic districts before a short break for lunch on your own.
At the end of the day, your driver-guide returns you to the pier in Bari.