Þingvellir National Park | Golden Circle: Platinum Tour | Hidden Iceland | Photo by Mark Hoey Posted on October 21, 2019March 2, 2021 UNESCO WORLD HERITAGE SITE 4 DAY PRIVATE TOUR 750 × 563 Silfra fissure at Þingvellir National Park in the Golden Circle: Platinum Tour. Hidden Iceland. Photo by Mark Hoey Þingvellir National Park | Golden Circle: Platinum Tour | Hidden Iceland | Photo by Mark Hoey