The best day out from Reykjavík is an all-day road trip called the Golden Circle. The drive is punctuated by roadside attractions, and the highlight is Þingvellir — a sight that’s of both historical and geological importance. Walk with me down the great fissure, where the tectonic plates of Europe and America meet.
Heading to Iceland? Pick up a copy of the new Rick Steves Iceland guidebook at http://www.ricksteves.com/iceland-book. Happy travels!