Venice, Italy Many have called this Old World maritime center the most beautiful city on earth. Millions visit each year, attracted by the image of a romantic sunset serenade on a gondola while dreamily floating down on the Grand Canal. Dawn offers its own distinctive window into this city's character, long before the gondolas awake. This episode departs from the fixed vantage points of past Sunrise Earth shows. For the first time, we take a voyage by slow-moving boat. We do our best to get lost within the 28 miles of the Venetian canal system. A mesmerizing passage into the Cannaregio district reveals the lesser-known beauty behind the city's famous glitz. Workboats slip under low bridges and their even lower hanging verdant plants. Cool yellows and pinks catch the morning sun and betray the Santa Maria dei Miracoli and some of the world's finest marble stonework. Window shutters are opened by sleepy-eyed Italians, startling the pigeons, which roost along the narrow waterways at night. We silently pass the sites where famous Venetians once awoke each day; such as the great Renaissance painter Tintoretto and the Orient explorer Marco Polo. Fishermen motor by, on their way to the open air market in the Rialto, with over 100 varieties of fish. Caught amidst the tension of the moving and the still, the beauty of Venice is sustained for another day.