Look closely at the picture in the middle. It shows a wooden structure on Pentecost Island in Vanuatu. See the man jumping down? That's where bungee jumping was invented. People on Pensecost Island build these towers and jump down with vines tied to their feet because it proves manlyness and brings luck for good crops.
Thank you, Jenny, for this great postcard and the explanation. Everyone go and check her blog: www.whereisjenny.com