Cities, second prize An aerial view of Whampoa Garden, Hong Kong, reveals its densely packed buildings. I drew inspiration from the Kowloon Walled City—once the densest place on Earth–which was demolished nearly three decades ago. Hundreds of houses were stacked on top of each other and there was very little open space. The Kowloon Walled City may be gone, but its legacy remains. It exists in Hong Kong’s modern architecture and stacked apartments, which have been built to accommodate the masses.

Photograph: Andy Yeung/National Geographic Travel Photographer of the Year