Search: pigeon houses
Why: In this collection of aerial photography by Yann Arthus-Bertrand:
Pigeon Houses Mit Gahmr Delta, Egypt
Answer: Well, they are houses for pigeons! But why? Because:
Pigeon is a part of the daily diet in many parts of EgyptHorf! Also, they use the droppings as fertilizer. The houses, called dovecotes, are made of natural mud brick.
Source: EarthArchitecture.org
The More You Know: Other interesting images from that collection:
Sha Kibbutz, Israel
Copenhagen, Denmark
Denver, Colorado
