Amoreira Aqueduct (Aqueduto da Amoreira) built on foundations of a Roman aqueduct, in the town of Elvas, Alentejo, Portugal, Europe

Eiffel Tower on a sunny day with blue sky and fluffy clouds, iconic Parisian landmark, Paris, France, Europe

Eiffel Tower with fountains on a sunny day, clear blue sky, Paris, France, Europe

Aerial of the Monastery of the Dominicans of Batalha, built to commemorate the Portuguese victory over the Castilians at the battle of Aljubarrota in 1385, UNESCO World Heritage Site, Batalha, Centro, Portugal, Europe

Entrance to the Alcazar of Seville at the Puerta del Leon (Gate of the Lion), the main access point through the outer wall, UNESCO World Heritage Site, Seville, Andalusia, Spain, Europe

Bell tower, Cathedral of San Giorgio, Ferrara, Emilia Romagna, Italy, Europe

Blue tiles (Azulejos) on exterior of Chapel of Santa Catarina (Chapel of Souls), UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

Rabelo Boats on the River Douro, Porto, Norte, Portugal, Europe

Gothic Cloisters with Baroque Azulejos, Porto Cathedral, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

Partly submerged mosque of Eski Halfeti due to the construction of the Birecik Dam on the Euphrates River, Old Halfeti, Turkey, Asia Minor, Asia

Aerial drone panoramic view of the Alcobaca Monastery (Alcobasa Monastery), UNESCO World Heritage Site, a Catholic monastic complex, Alcobaca, central Portugal, Eurpe

Cityscape seen from Park Guell, Barcelona, Catalonia, Spain, Europe

Monastery of Alcobaca, UNESCO World Heritage Site, Alcobaca, Oeste, Portugal, Europe

Angkor Wat, UNESCO World Heritage Site, a Hindu-Buddhist temple complex near Siem Reap, Cambodia, Indochina, Southeast Asia, Asia

Circumnavigation monument, Shoreline of Punta Arenas, Patagonia, Chile, South America

Vernacular rural architecture, Bran, Transylvania

Detail of decorated circle and statues at Astronomical Clock at Old Town Square, UNESCO World Heritage Site, Old Town, Prague, Czechia, Europe

Basilica Cistern columns, Istanbul, Turkey, Europe

View of Saint Peter's Square in Vatican City, the papal enclave in Rome, from St. Peter's Basilica, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Perito Moreno Glacier, UNESCO World Heritage Site, around El Calafate, Santa Cruz province, Patagonia, Argentina, South America

The Trevi Fountain, an 18th-century fountain, the largest Baroque fountain in the city, UNESCO World Heritage Site, Trevi District, Rome, Lazio, Italy, Europe

Heart sign, Nao Victoria Museo, Shoreline of Punta Arenas, Patagonia, Chile, South America

The ruins of Berber troglodyte structures, Tataouine region, southern Tunisia

St. Nicholas Church on foggy morning at sunrise, Prague, Czech Republic (Czechia), Europe

Sacre-Coeur Basilica with tourists on sunny day, Paris, France, Europe

Tourists enjoying a sunny day at the iconic Arc de Triomphe, with clear blue skies in the background, Paris, France, Europe