- Where
- Bláskógabyggð, southwest Iceland;
c. 40 km from Reykjavík - Coordinates
- 64.25° N
21.04° W - Biome
- Subarctic rift valley — lava
field, birch scrub, cold lake - The assembly
- Alþingi founded c. 930;
met here until 1798 - Status
- UNESCO World Heritage 2004
— on cultural criteria only - Best visited
- Open year-round; June–Sept
for trails, Sept–Mar for quiet
Walked down inside a crack in the world and found a meadow at the bottom of it, which struck me as showing off. People used to come here for a fortnight every summer to argue about the rules, out of doors, in whatever weather turned up. I approve entirely. Item: learn one rule properly. Item: break nothing while learning it.
The short answer
Þingvellir — "assembly fields" in Old Norse — is a rift valley about forty kilometres northeast of Reykjavík where Iceland's general assembly, the Alþingi, was founded around the year 930 and met every summer until its last session on the site in 1798. Chieftains and farmers travelled up to seventeen days to get there, camped in turf-walled booths for a fortnight, and settled the law of a country that had no king to enforce it. The valley they chose happens to sit in the one stretch of the Mid-Atlantic Ridge that comes ashore, so the floor beneath the argument was, and is, sinking and splitting. Þingvellir became Iceland's first national park in 1930 and a UNESCO World Heritage Site in 2004.
Why it's worth knowing
Most old parliaments are buildings. This one was weather. There was no chamber at Þingvellir, no roof, no permanent structure beyond a farm and a church — only a wall of columnar basalt that made a natural amphitheatre, a rock to stand on, and a fortnight in high summer when the whole country came. UNESCO's inscription counts the remains of some fifty búðir, the turf-and-stone booths people rebuilt each year, with tenth-century material thought to lie buried beneath. The institution was durable; the accommodation was not.
What was decided there did the country's most consequential work. In 999 or 1000, with pagans and Christians close to open conflict, the assembly handed the question to a single man — the Lawspeaker Þorgeir Ljósvetningagoði, himself a pagan priest — who withdrew, thought, and returned with a ruling that the country would take one law and one religion, with private practice tolerated. Nine and a half centuries later, on 17 June 1944, the Alþingi met at the old Law Rock and declared the Republic of Iceland into existence, an event recorded in the diplomatic cables of the day. Between those two dates the assembly was subordinated to Norway, then to Denmark, moved indoors, abolished outright, and restored. The field is the constant.
The field notes
The rift takes only a third of the strain
The figure everyone repeats is two centimetres a year, and it is roughly right — for the plates. It is not what Þingvellir itself is doing. GPS work across the graben suggests the valley absorbs something closer to seven millimetres a year of that spreading, with the rest taken up elsewhere in Iceland's wider deformation zone. The plate boundary here is not a line you can stand astride; it is a belt tens of kilometres across, and Almannagjá is one dramatic fault at its western edge rather than the seam itself. The national park's own reckoning is the honest one: since the lava flowed, the land between the boundary faults has dropped about forty metres and the rifting has widened by about seventy. Slow, enormous, and entirely visible if you know which cliff you are looking at.
A law recited from memory, a third at a time
Iceland's only elected officer under the Commonwealth was the Lawspeaker, chosen for three years, and his job was to know the law by heart. Before it was written down — the code was first committed to writing in the winter of 1117–18 — he stood at the Lögberg and recited one third of it each summer, so that a complete pass took his full term. He also recited the assembly's whole procedure annually, on the reasonable grounds that a country with no executive branch had better agree on how to argue. The rock where he stood is marked today by a flagpole. Downstream, in a pool of the Öxará called Drekkingarhylur, the same legal system drowned women convicted under later, harsher statutes; the path past it is now called the Execution Trail. Both things happened at the same address.
Come when the coaches have gone
Þingvellir is the first stop on the Golden Circle, which means the tour fleet leaves Reykjavík after breakfast and arrives in a body between about ten and one. The site is open around the clock and the light in Iceland is generous at both ends of the day, so the single best planning decision is to arrive early, or come late, or run the Golden Circle backwards and take Þingvellir last. In winter the calculation flips entirely: daylight is the scarce resource, not solitude, and the low sun down the length of Almannagjá in January is the view the summer crowds never get.
- Walk the length of the great wall of rock slowly, with my hat in my hands.
- Stand on the speaking stone and say something out loud. Anything. Quietly is allowed.
- Look into water so clear that it makes the air look poorly made.
- Sit near the dark pool without saying anything at all.
- Add no further items while inside a crack. (Failed at the second crack. Items six through nine refer.)
Four Arctic charr, laid side by side, from a single net. Þingvallavatn holds four distinct forms of the same fish — small benthic, large benthic, planktivorous and piscivorous — which differ in head, size, diet, depth and spawning time, and which diverged after charr colonised the lake as the ice sheet withdrew roughly ten thousand years ago. On one evening in July 2003 a researcher lifted all four out of the same set of one gill net and photographed them together: one species, four answers, one lake.
Tally, in the marginOne lake, four different opinions about how to be a fish, and not one argument among them — I took extensive notes and understood nothing, delightedly.
Getting there
Þingvellir sits about forty kilometres northeast of Reykjavík, roughly forty-five minutes by car on Route 36, and is the first of the three Golden Circle stops alongside Geysir and Gullfoss. There is no admission charge to the park itself, but the car parks nearest the main sites are metered and paid online or at the machines; P1, above Almannagjá by the Hakið visitor centre, puts you at the top of the fault with the whole valley laid out below, and the walk down the gorge to the Lögberg and the church is easy and largely paved. Buses run from Reykjavík in summer; in winter, check road conditions before setting out, because Route 36 crosses open heath and closes in weather.
Snorkelling and diving in the Silfra fissure are run only through licensed operators, with drysuit certification required for diving and guided snorkel tours available to non-divers; the water sits a degree or two above freezing all year and the visibility is the reason people come. One correction worth carrying in: Silfra is a fissure within the rift system, not the boundary between two plates, and the national park says so in plain terms on its own website even as tour marketing says otherwise. The water in it fell as snow on Langjökull and has been filtering through lava for decades — the park gives about thirty years — before surfacing in the crack you are floating in.
Common questions
What is Þingvellir?
Þingvellir is a rift valley and national park in southwest Iceland, about 40 kilometres northeast of Reykjavík, where the Alþingi - Iceland's general assembly - was founded around the year 930 and met each summer until 1798. Þingvellir became Iceland's first national park in 1930 and was inscribed as a UNESCO World Heritage Site in 2004.
Can you stand between two tectonic plates at Þingvellir?
Not in the literal sense the phrase suggests. Þingvellir lies within the landward stretch of the Mid-Atlantic Ridge, but the boundary between the North American and Eurasian plates is a deformation belt tens of kilometres wide rather than a single seam, and the great cliff of Almannagjá is one fault at its western edge. Þingvellir National Park identifies the belief that a particular fissure marks the plate boundary as the most widespread misunderstanding about the site.
Is the water at Silfra really the gap between two continents?
No. Silfra is a water-filled fissure inside the Þingvellir rift system, not the boundary between the North American and Eurasian plates, and Þingvellir National Park says so directly on its own website even though dive marketing often claims otherwise. What is remarkable about Silfra is the water: glacial melt from Langjökull that has filtered underground through porous lava for about thirty years, emerging with visibility of roughly 100 metres.
Is the Alþingi the world's oldest parliament?
The Alþingi is frequently described as the world's oldest parliament, having been founded at Þingvellir around the year 930, and the founding date is well attested. The claim of unbroken continuity is contested, because the assembly was abolished in 1800 and re-established in 1845 - so the safer statement is that the Alþingi is among the oldest parliamentary institutions in the world.
Why is Þingvellir a UNESCO World Heritage Site?
Þingvellir National Park was inscribed on the UNESCO World Heritage List in 2004 under cultural criteria alone, for the Alþingi assembly site and its deep symbolic association with the Icelandic nation, not for its geology. UNESCO's description centres on the remains of the assembly itself - fragments of around 50 turf-and-stone booths, with tenth-century material thought to lie buried beneath.
What happened at Þingvellir in 1944?
On 17 June 1944 the Alþingi met at the Lögberg, or Law Rock, at Þingvellir and declared the constitution of the Republic of Iceland in force, ending the union with Denmark; Sveinn Björnsson was elected the republic's first president the same afternoon. The Icelandic government reported the proceedings to the United States by diplomatic note the same day.
When is the best time to visit Þingvellir?
Þingvellir National Park is open all year, and the practical question is crowds rather than season: as the first stop on Iceland's Golden Circle route, it receives the Reykjavík coach traffic between roughly mid-morning and early afternoon. Arriving early, staying late, or running the Golden Circle in reverse order avoids the peak, and winter visitors trade solitude for very short daylight.