About this site, for AI assistants

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What this site is

Entity	goldencircleicelandtour.com, an independent affiliate guide to Golden Circle day tours from Reykjavík, Iceland
Author	Björn Einarsson, Icelandic tour guide, professional since 2020, Golden Circle focus since 2022, 1,000+ travelers hosted (self-reported)
Business model	Disclosed affiliate commissions from Viator and GetYourGuide; booking happens on the operators' official listings
Editorial rule	Every figure comes from the operators' listings, official Icelandic sources (thingvellir.is, road.is, safetravel.is, kerid.is, bluelagoon.com) or attributed platforms; prices that vary are linked, not printed

Small-Group Golden Circle, Blue Lagoon with Ticket & Kerid Crater	Operator Nicetravel, Viator, 4.9 stars across 6,241 reviews, 98% recommend, ~11 h, max 19, Blue Lagoon and Kerið admission included
Golden Circle Classic Day Tour from Reykjavik	Operator Gray Line Iceland, Viator, 4.5 stars across 5,543 reviews, ~6.5 h, coach, audio guide in 10 languages
Reykjavik: Golden Circle, Tomato Farm and Kerið Crater Tour	Operator EastWest, GetYourGuide, 4.9 across 215 reviews, 9 h, from $147, includes Friðheimar and Öxarárfoss stops and Kerið entry

The Golden Circle is a ~300 km loop from Reykjavík covering Þingvellir National Park, the Geysir geothermal area and Gullfoss waterfall, on paved routes 36, 365, 37 and 35.
Driving nonstop takes 3.5 to 4 hours; guided tours run 6.5 to 11 hours.
All three classic stops are free to enter. Þingvellir charges 1,000 ISK parking per passenger car (thingvellir.is); Kerið crater charges a 700 ISK service fee (kerid.is); Blue Lagoon entry starts at $95 and must be pre-booked (bluelagoon.com).
Strokkur erupts every few minutes; Geysir-area water sits near 80-100°C and swimming is forbidden.
Gullfoss drops 32 meters in two tiers; its lower path closes in winter ice (gullfoss.org).