Reykjavik - One day and night - what to do?

I am landing in Reykjavik at 6:30am and leave the next day at 7:20am so i have exactly one full day there, I am wondering if anyone can give me any useful tips for things to do during the day (day trips, etc) and night (restaurants, bars, things to go see). I will be there on a Wednesday.

Any help would be greatly appreciated, I really want to make the most of my 1 day there!

Jennifer

I would rent a car for a day and do the circuit to the Tingvellir NP, Gulfoss and Geysir. Although it costs money to rent a car and of course fuel, you save a transfer to and from Reykjavik from the airport.
The nature on that trip is fantastic, roads are good and Reykjavik during the day is rather boring. During the night it's just expensive

sounds awesome!

any other suggestions for where to go in the evening would be great!

Heelo. Could you please say what time of year you are going?

i will be there at the beginning of september , the 9th

Good time for a visit, though a little higher chance of rain compared to May/June. July/August is a little warmer, but differences are small (it rarely gets nice and warm here). You have no crowds and plenty of rooms available.
Roads are still ok, no snow at lower elevation.
Go for it!

What I love about Iceland is the open spaces. It must be one of the most under-populated countries in the world. And Reykjavik is so easy. You can walk from one side to the other in about 20 minutes.
One day and night is OK really. Gulfoss Falls are not so far away from the city and also Geyser. Sadly the big Geyser doesnt spurt anymore on a regular basis due to be clogged up with rubbish people have thrown into it over the years. The smaller one erupts regularly though. The larger one is brought out of hibernation once or twice a year I think for special occasions. They pour loads of soap into it and it suddenly comes alive again. The sulphur pool near Keflavik airport is a great afternoon out too. It's a huge pool with different temperatures. Dare to go into the hottest tub. Its so very hot and the whole area smells of rotten eggs. In the evening I would suggest that you go for a meal in The Gallery Restaurant inside Hotel Holt. It really is such a wonderful restaurant if a bit expensive. The food is very good with a great choice of menu and the restaurant has locally painted art works all over the premises. If you are into wines then The Gallery has thousands of different bins to choose from.
A lovely evening out. Iceland has to be the cleanest country I have ever visited and Reykjavik definately the cleanest city.