The Silver Circle emerged in the mid-2010s as a deliberate counter-narrative to the Golden Circle's overcrowded pull-offs, mapping a 150-kilometre loop through Borgarfjörður that connects Europe's highest-flow hot spring, a lava-field waterfall system fed by sub-glacial melt, and a 1,600-metre basalt cave hollowed by a single eruption 900 years ago.
Unlike its southern counterpart, the route carries no official designation by the Icelandic Road Administration; the name was coined by tour operators seeking a northern alternative once Þingvellir and Geysir began logging 1.2 million visitors annually. The corridor follows Route 1 north to Borgarnes, then arcs inland along Route 518 past Reykholt — the 13th-century estate where Snorri Sturluson wrote the Prose Edda — before looping back via Húsafell.
Deildartunguhver releases 180 litres of boiling water per second, the thermal output equivalent of 650 megawatts, piped 64 kilometres west to heat the towns of Borgarnes and Akranes. The spring sits in an open field with no ticket booth; visitors walk a 50-metre boardwalk above vents that reach 97°C at the surface. Hraunfossar, six kilometres east, pours from the porous edge of the Hallmundarhraun lava field in hundreds of rivulets across a 900-metre span, the water filtered through basalt over 1,000 years since the eruption. Barnafoss, 200 metres upstream, cuts a narrow chute through columnar rock; the name — Children's Falls — references a medieval drowning incident recorded in the Landnámabók settlement records.
Víðgelmir, Iceland's second-longest lava tube at 1,585 metres, requires a guided entry; the cave floor is paved for 400 metres, lit by portable lamps that reveal ice columns and oxidised mineral streaks in the ceiling. Krauma Geothermal Baths, opened in 2017 adjacent to Deildartunguhver, channels the spring's runoff into five outdoor pools ranging from 37°C to 41°C, with a single cold plunge fed by Raudsgil glacier stream at 5°C. The Silver Circle tour from Reykjavik typically includes three to four stops across six to eight hours, with departures weighted toward morning to maximise daylight in the Húsafell interior. Most operators bundle Krauma as an optional add-on rather than a default inclusion; the baths charge a separate entrance fee unrelated to the route itself, which remains free to drive year-round.
8 hr 30 min
