Experience the raw beauty of iceland both above and below ground on this day trip from reykjavik descend into the lava caves of the blue mountains with a guide to see otherworldly rock formations and craters and follow the famous golden circle route to see three of its natural wonders admire gullfoss waterfall see the spouting strokkur spring and pools at geysir and view the tectonic rift at unesco listed thingvellir national park the site of ancient viking parliaments numbers are limited