Benagil Kayak Tour. Our main 2.5-hour kayak tour to the Benagil Cave from Marina de Portimão, for groups of up to 24. 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 #benagilcavetours