Þingvellir National Park | Golden Circle: Platinum Tour | Hidden Iceland | Photo by Mark Hoey. Thingvellir National Park. Posted on October 21, 2019October 27, 2022 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. Thingvellir National Park. Þingvellir National Park | Golden Circle: Platinum Tour | Hidden Iceland | Photo by Mark Hoey. Thingvellir National Park.