Where to park: Fjaðrárgljúfur can be reached over a dirt road. At the end of it is a parking spot. The road can be driven with a normal car but it is not really pleasant and it will take up to 30 minutes or longer.
What to do: hike up the Fjaðrárgljúfur. Plan in around 1 to 2 hours.
Tips: Take some time to enjoy the silence.