Essentially the precursor to bungee jumping, this ancient ritual sees brave men and boys of the Sa tribe (near Tansip, on Pentecost Island, in a remote part of the South Pacific) hurtle towards the ground head first from wooden towers of 20-30 metres high, at speeds of more than 40mph, with nothing but tree vines tied around their ankles and no safety equipment. Tribal members on terra firma sing and dance to help the divers be brave. The vines act as bungee cords and each diver is invited to build their own platform and select their own vine so no one else can be blamed for a fatal accident. If the vine is too short the jumper will crash back into the tower. If it’s too long, he will almost certainly break bones or possibly even perish. Watch National Geographic’s video about Vanuatu’s famous land divers.