The Jokulsilon lagoon is big, filled with icebergs, cold, windy and very popular. We arrived at 12:30 and couldn't get a seat until 4:00. Five groups in line ahead of me all left without buying tickets or canceled the vouchers they already had. That took almost 20 minutes and i was cold cold cold even with three layers. I got to see some inappropriate outfits but only photographed one. We booked and then came back at 4.