View from the Tsutenkaku Tower in the Shinsekai area, of the city skyline, Osaka, Honshu, Japan, Asia

Aerial view over city including Basilique du Sacre-Coeur, Paris, France

Typical Hong Kong homes with air conditioners hanging from windows, Kowloon, Hong Kong, China

Adult glaucous gull (Larus hyperboreus) eating common eider duckling (Somateria mollissima) in Svalbard, Norway, Arctic, Europe

Skyline, Fez. Morocco

Chefchaouen. Morocco

Fez. Morocco

Roofs of the medina, Fez. Morocco

Medina, UNESCO World Heritage Site,Tetouan, Morocco

Dense habitation line up the coastline, El Morro Fort, San Juan, Puerto Rico

Side view of a dome, San Juan, Puerto Rico

View of a city with a cluster of houses

Aerial view of a densely populated coastal area, Puerto Rico

Aerial view of Georgetown looking along Wisconsin Ave., Washington , DC

Cityscape showing dense urban areas and roadways with smog in the air, Los Angeles, California, United States of America

Aerial view of cityscape showing dense urban areas and roadways, Los Angeles, California, United States of America

Colonial City of Guanajuato, Guanajuato, Mexico