The Tajamar under the Mapocho

This is a part of the Mapocho's Tajamares. It was a huge brick wall built during Chile's colonial period, in 1792, to protect the city against the periodic floods of the Mapocho river.
They were buried by the city's growth and rediscovered almost two centuries later, during the excavations of Santiago's subway construction. The strange part: It was financed using a special tax to sugar and yerba mate...

I'll be absent for the rest of the week. I have to leave Santiago for work reasons. See you on monday.