Lava tube tours
Reykjanes is riddled by a subterranean network of lava tubes, formed when the sides of a deep lava flow cool and solidify, allowing the still-liquid centre to drain away after the eruption ends. Pick of the local tubes include kilometre-long Raufarholshellir; the similarly scaled Buri Cave, only discovered in 2005; Þríhnúkagígur, though this is actually a drained magma chamber; and Leiðarendi, perhaps the most accessible. With the exception of Þríhnjúkagígur, you can only visit these as part of a tour offered by Extreme Iceland.
The Bridge Between Two Continents
About 2km south from the Hafnaberg car park, the Bridge Between Two Continents is a thin steel span in the middle of nowhere, supposedly crossing the rift separating the North American and Eurasian continental plates. The bridge is decked in steel mesh, so you can look down into the shallow ravine below; “contrived” doesn’t begin to describe the site, but the idea is fun and it’s perked up by “Welcome to America” and “Welcome to Europe” signs at either end.
Top image: Seltun geothermal area, Krysuvik, Reykjanes peninsula in Iceland © Olga Gavrilova/Shutterstock