Roofs of Potosi, Bolivia

Located at an altitude of over 4000m, Potosi is a city with a fascinating history: Thanks to the giant silver mine in Cerro Rico, the mountain in the background, Potosi became the richest city in the world in the 16th century. These times are over, but many impressive churches built by the Spanish remain.

^{1/320s; 18mm; f/8.0; ISO 100}

I have also posted this photo on my blog.