Mes notes

Les prix incluent les taxes et le service. Il n'est pas nécessaire de laisser un pourboire.
Il n'est pas nécessaire de détenir de l'argent comptant. Les cartes sont acceptées quasiment partout.
L'Islande est une société fondée sur la confiance.
Il faut goûter l'agneau d'Islande. C'est très cher mais ça en vaut vraiment le coup.
Il faut goûter l'omble arctique. C'est vraiment savoureux.
Il faut éviter d'acheter de l'alcool, celui-ci est très lourdement taxé. Au besoin, il est préférable de l'acheter à la boutique hors-taxe de l'aéroport. Celle-ci est accessible dans la zone internationale également depuis les arrivées. Son inventaire est très complet et on y retrouve la plupart des boissons islandaises.

Reykjavik

https://reykjavikcampsite.is/ everything works online. Check what other travelers have left. You could find thing you need without buying.
Bonus (x2) around, so it's easy to get some food
Ice-cream parlor around the corner at walking distance of the campground
Direct bus to downtown
Perlan interactive nature museum
To eat quite pricey. Messin or Apothek (lunch) really good food. It's a good idea to have reservations.
https://bbp.is/ for hotdogs. Many location. I recommend the hotdog with everything. Cheaper.
Sun Voyager - sculpture to remind Iceland about their heritage. Nice scenery
Harpa Hall
Hallgrimskirkja - main church, can be visited. Offers a nice view of the city
Lava show also in Reykjavik

Seljalandsfoss + Gljufrabui. 2 magnifiscents waterfalls, they are at walking distance from each other. Must see!
Skógafoss (+trail) + Kvernufoss, 2 must see waterfall at least the first one.
Sólheimasandur plane crash on the black sand beach
Dyrhólaey natural reserve beautiful scenery but no chance to see puffins at this time of the year
Reynisfjara black sand beach with basalt columns. Must see!
Lava show in Vìk
Nice camping in Vìk, there is an old school bus retired as a coffee shop next to it.

Fjallsárlón a lake with icebergs, there are tours to approach the ice
Fjallsárlón + diamond beach. Must see. Icebergs (small) everywhere. Might see some seals.
Ok camping in Höfn. Open year long but not open all day. Be patient.
Outside of Höfn, Verstrahorn. Nice mountain at see level. Nice scenery
Eating in Höfn, Pakkhus. Nice experience

That's a long stretch. Not much civilization along the road except if you're willing to go outside the ring road.
I'll enjoy the scenery except if you want to stop and have a hike somewhere. There are some but they might be outside the ring road.

Viti crater in the middle of the lava field. Nice scenery
Namaskard lava field. Must see!
Myvatn nature bath to end a beautiful day. Hot bath with a beautiful view of the lake. Worth the money not like blue lagoon
Nice camping in Reykjahlíð
Eating Reykjahlíð, Mylla. Nice experience
Vindbelgjarfjall, nice hike to the top of the mount. Pretty hard but worth the view on the lake

The Cave Vidgelmir. Must see. Lava cave. Really nice experience
Hraunfossar Waterfall. Must see. Hundreds of waterfalls flowing between the bedrock and the lava field. It's more interesting to see it after visiting the cave since you'll have an explanation of the phenomenon
https://www.caferiis.is, go there for a really nice lamb selection. Worth it!
https://ust.is/english/visiting-iceland/protected-areas/westfjords/hornstrandir/, go there for the wilderness and the arctic fox

Drive around Snæfellsness peninsula. Nice scenic route. Many spots to enjoy nature. Sparsely populated.
dive.is if you're in the mood for snorkeling (golden circle). Nice experience but I would not recommend on a tight schedule
west fjords. Beautiful places to visit but I would not recommend on a tight schedule
Glymur waterfall (west coast) one of the highest waterfall in Iceland. A nice hike on a cliff to get to the top of the waterfall. Need to cross the river. Awkward “bridge” crossing at the bottom, water crossing at the top. It's better to start by the river crossing at the bottom. Awkward.
Not to far from Reykjavik, Reykjadalur hike. Easy hike in a valley to get to the hot part of the river where one can bath. Access from Hveragerði