Viru Gate at dawn, Old Town, Tallinn, Estonia

View over the Old Town towards St Olaf's Church at sunrise, Tallinn, Estonia

View over the Old Town towards St Olaf's Church at dawn, Tallinn, Estonia

View over the Old Town towards St Olaf's Church at dawn, Tallinn, Estonia

Museum Of The Future, Emirates Towers & Sheikh Zayed Road, Dubai, United Arab Emirates

Town gate, Burkheim am Kaiserstuhl, Breisgau, Southern Black Forest, Baden-Württemberg, Germany

San Gimignano at sunrise. Siena province, Tuscany, Italy

Venice, Veneto, Italy. Campo San Barnaba at sunset.

Cason di Formin mountains during a summer sunrise, Dolomites, municipality of Cortina d'Ampezzo, Belluno province, Veneto, Italy

San Gimignano, known as the Town of Fine Towers, Siena province, Tuscany, Italy.

San Gimignano, known as the Town of Fine Towers, Siena province, Tuscany, Italy.

UAE, Dubai, Marina. Dawn view over apartment blocks in the affluent Dubai Marina neighborhood

Boat going towards Charles Bridge and Church of Saint Francis of Assisi with Old Town Bridge Tower at sunset, Prague, Bohemia, Czech Republic

Charles Bridge and Old Town Bridge Tower at night, Prague, Bohemia, Czech Republic

Charles Bridge with mist at sunrise, Prague, Bohemia, Czech Republic

Krivoklat Castle amidst trees against sky during sunset, Krivoklat, Rakovnik District, Central Bohemian Region, Czech Republic

Walking down the stairs to Mala Strana district, Prague, Czech Republic

UK, England, Northumberland, Dunstanburgh Castle, Lilburn Tower

Aerial view of Siena old Town. Siena, Tuscany, Italy, Europe

The Eiffel Tower in the morning fog as seen from the observation deck at the Palais de Chaillot, Paris, France

Equestrian staircase, or riders staircase, in the Rundetaarn (Round Tower), a 17th-century tower, built as an astronomical observatory in Copenhagen, Denmark

Basilica-Cathedral of Our Lady of the Pillar & Roman Bridge Over Ebro River at Dusk, Zaragoza, Spain

View over Via Santa Maria towards Cathedral and Leaning Tower at dusk, Pisa, Tuscany, Italy

View over Via Santa Maria towards Cathedral and Leaning Tower at sunset, Pisa, Tuscany, Italy

Palazzo Vecchio at dusk, elevated view, Florence, Tuscany, Italy

Cityscape with San Domenico Basilica and Asinelli Tower at sunset, elevated view, Bologna, Emilia-Romagna, Italy

Cityscape with San Domenico Basilica and Asinelli Tower at sunset, elevated view, Bologna, Emilia-Romagna, Italy

Neuschwanstein Castle, Fussen, Bayern, Germany

Asia, Southeast Asia, Vietnam, Southern Vietnam, Ho Chi Minh City, the illuminated skyline of the city reflected in the Saigon river

Garachico, Puerto de la Cruz, Tenerife, Canary Islands, Spain

The Basilica of the Royal Marian Shrine of Our Lady of Candelaria, Candelaria, Tenerife, Canary Islands, Spain

Petronas Towers, KLCC, Kuala Lumpur, Malaysia

KL Tower & Petronas Towers, Kuala Lumpur, Malaysia

Skyline with KLCC and Petronas towers, Kuala Lumpur, Malaysia

Petronas towers reflected, Kuala Lumpur, Malaysia

Azerbaijan, Baku, Old City and Flame Towers

City skyline at dusk, Petronas Towers, KLCC, Kuala Lumpur, Malaysia