What is there to see in West Iceland?+
Borgarfjörður, an hour and a half from Reykjavík: Hraunfossar, where a river seeps out of a lava field in dozens of falls; Deildartunguhver, Europe's most powerful hot spring, with the Krauma baths beside it; Reykholt, home of Snorri Sturluson; Viðgelmir lava cave; and Húsafell, the base for Into the Glacier on Langjökull. The Silver Circle day (/experience/942187/, /experience/942060/) covers most of it. It is quieter than the Golden Circle and just as good.
What is Into the Glacier and is it worth it?+
A man-made tunnel inside Langjökull, Iceland's second-largest glacier, reached by a modified truck from Húsafell or Klaki base camp. You walk lit corridors and chambers through the ice, open all year. It is engineered, not a natural cave, and the operator says so. It is worth it in summer, when no natural ice caves are open, or if you want a reliable glacier experience without crampons. Tours run from Reykjavík (/experience/909299/) or on location (/experience/303329/).
Is the Silver Circle worth doing instead of the Golden Circle?+
As a second day, yes. As a replacement, only if you have already done the Golden Circle or want to avoid crowds at any cost. The Silver Circle has hot springs, waterfalls, a lava cave and the Krauma or Húsafell Canyon baths (/experience/942060/), but no geyser and nothing on the scale of Gullfoss. It takes about ten hours from Reykjavík. Do the Golden Circle first; then this.
Can you visit West Iceland in winter?+
Yes. The roads to Borgarfjörður and Húsafell are paved and kept open, and Into the Glacier runs all year. Hraunfossar in snow is as good as in summer. Daylight is short in December and January, so tours compress. Snowmobiling with the glacier tunnel (/experience/841485/) is a winter combination that works from Húsafell. Krauma is warm whatever the weather. Check the tour page for winter departure days; some run fewer times a week.