The complexity, elegance and balance of Warre's Vintage Ports are a synergy of the great Quintas, da Cavadinha in Pinhão Valley and do Retiro in the Rio Torto. Warre also continue to make much of their Port by treading in stone lagares or shallow treading tanks. The Upper Douro is one of the last places in the world where traditional treading is still practised. This is not done to entertain visitors but because it continues to produce the best Port. Always the innovators, Warre have further developed a unique robotic lagar, a low and square tank fitted with mechanical treading pistons whose gentle movements replicate the action of the human foot by actually treading the grapes against the floor.