Sun setting behind the city of Florence with the Ponte Vecchio and Ponte Santa Trinita bridges over the Arno River, Florence, Tuscany, Italy, Europe

A panorama of the Ponte Vecchio bridge spanning the Arno River in Florence, UNESCO World Heritage Site, Tuscany, Italy, Europe

Looking along the Arno River to the Renaissance Ponte Santa Trinita bridge on a misty ethereal morning, Florence, Tuscany, Italy, Europe

Looking along a deserted Ponte Vecchio to the Duomo in the early morning half light, Florence, Tuscany, Italy, Europe

Panorama of the Florence skyline at dusk with the Palazzo Vecchio, Duomo and Campanile extending above the horizon, Florence, UNESCO World Heritage Site, Tuscany, Italy, Europe

Royal chateau of Amboise lit at dusk on the banks of River Loire, Loire Valley, UNESCO World Heritage Site, Indre et Loire, Pays de la Loire, Centre, France, Europe

The Ponte Vecchio on the Arno River on a misty morning with the Palazzo Vecchio shrouded in mist, Florence, UNESCO World Heritage Site, Tuscany, Italy, Europe

River Garry flowing beneath Garry Bridge along the Pass of Killiecrankie in autumn, Perthshire, Scotland, United Kingdom, Europe

Looking across the Ponte Vecchio to the Oltrarno region of Florence lit in early evening light, Florence, Tuscany, Italy, Europe

Looking across the San Francisco Golden Gate Bridge with Fort George in the foreground at the edge of the Pacific Ocean, California, United States of America, North America

The Doge's Palace, Campanile, Bridge of Sighs and a flooded St. Mark's Square with gondolas lining the shore and Alps beyond, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Looking along the Grand Canal from the Rialto Bridge at dusk, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

A gondola crossing the Grand Canal with a vaporetto and the Rialto Bridge beyond, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe

Panorama of Venice waterfront including Doge's Palace, Campanile, St. Mark's Square and Bridge of Sighs, taken from San Giorgio Maggiore, Venice, UNESCO World Heritage Site, Veneto, Italy, Europe