Algarve Explorer Half Day Tour. Around 3-hour quad tour to Alte village with a swim in its freshwater spring pool and a finish at Paderne Castle, from EUR 77.50 per person. Every operator on the Circle is booked direct. No commission, no middleman, no booking fee stacked on top: you deal directly with the people who run it. Reserva direta com quem opera, sem comissões e sem intermediários. #algarve #algarvecircle #portugal #thingstodoalgarve #buggyquadtours