Þingvellir tectonic plate boundary in the Golden Circle by Erik Solie, Hidden Iceland. Thingvellir National Park. Posted on October 9, 2022October 27, 2022 961 × 1440 Þingvellir tectonic plate boundary in the Golden Circle by Erik Solie, Hidden Iceland. Thingvellir National Park. Þingvellir tectonic plate boundary in the Golden Circle by Erik Solie, Hidden Iceland. Thingvellir National Park.