Persians built enormous towers for pigeons, and these strange buildings helped fertilize their fields. They were called pigeon towers, and some of the most famous examples were built around Isfahan, where thousands of birds could roost inside.
But the pigeons weren't the real prize. Their droppings were collected and used as a valuable natural fertilizer for crops and gardens.
The towers were carefully designed, with hundreds of small nesting spaces, giving pigeons a protected place to settle while keeping predators out. And the design wasn't random. The tall, circular walls and narrow entrances created a protected interior packed with nesting compartments.
Farmers could periodically collect the accumulated droppings from inside and use them to enrich the soil. In other words, these enormous towers were part of a larger agricultural system: birds came in, waste was collected, and nutrients went back to the land.
What looks like a bizarre monument was actually a practical piece of Persian agricultural infrastructure. They didn't build towers for pigeons because pigeons were sacred; they built them because even bird droppings had value.
@ilearn