After the Conquest, the Spaniards in the Viceroyalty of New Spain had to face numerous inundations, although the Aztecs didn't suffer them in such a measure thanks to a complicated draining system. In 1604, they decided therefore to build the Desagüe de Huehuetoca, which would solve their fight against the nature.
Nevertheless, the draining works never reached the pre-Columbine level, and to find a better solution, the Spanish King searched for a specialist also out of the Spanish territory, and found him in the person of Dutch hydraulic engineer Adrian Boot. This paper shows the international relations between two inimical empires - Spain and the United Provinces of the Netherlands, in the most complicated period of their coexistence: fights for naval and colonial supremacy, Dutch independence, religious discords, anti-Dutch climate, wars and truces, and one man between them, who at the beginning basked in the Spanish royal grace, but ended up denounced to the Inquisition of New Spain.