Skip the Line: Best of Venice Walking Tour including Basilica di San Marco. Explore the most famous sites in Venice with an insider guide on this 2-hour walking tour. Learn the history of iconic attractions around St Mark’s Square, and explore the commercial heart of this ancient city as you walk across the Rialto Bridge. Head to the front of the long line at St Mark’s Basilica to admire the cathedral’s glittering gold splendor without the wait. Book Special Offer ! Skip the Line: Best of Venice Walking Tour including Basilica di San Marco From $43.69.