It was a treat to do some work in Brazil for a couple weeks this spring but even more so to find we were based in the old colonial town of Ouro Preto. Established in the late 17th century by the Portuguese, it quickly grew to Brazil's largest city over the next 100 years. These days it is a bit of a tourist hub with steep cobbled streets, small shops and old churches. Its historical claim to fame (proximity to minerals deposits) was also the reason that we found ourselves in Brazil. A nearby mine requested a trial of our software to improve monitoring over a newly constructed dam.