Itinerary for 3 day trip to Reykjavik

Here's an ideal itinerary for 3 days in Reykjavik, keeping in mind your constraints:

Day 1:

Arrive in Reykjavik and pick up your rental car.
Head to the , a geothermal spa located about 45 minutes from Reykjavik. Soak in the warm, mineral-rich waters and enjoy the stunning views of the surrounding lava fields.
After your relaxing dip, drive back to Reykjavik and check into your hotel.
In the evening, head out to hunt for the Northern Lights. There are many tour operators that offer Northern Lights tours from Reykjavik, so you can choose one that suits your preferences.

Wake up early and drive to , a UNESCO World Heritage Site located about 45 minutes from Reykjavik. This is where the North American and Eurasian tectonic plates meet, and you can walk between them on a scenic path.
Next, drive to , a geothermal area with hot springs and geysers. The most famous geyser here is Strokkur, which erupts every few minutes.
After , drive to Gullfoss, one of Iceland's most famous waterfalls. The waterfall is located in a canyon and is truly breathtaking.
In the evening, drive to your igloo hotel and spend the night under the stars.

Wake up in your igloo and enjoy breakfast with a view.
Drive back to Reykjavik and spend the day exploring the city. Visit Hallgrimskirkja, a stunning church that offers panoramic views of the city from its tower.
Walk around the colorful houses in the city center and visit the , a beautiful glass building that hosts concerts and events.
In the evening, head out for a delicious dinner at one of Reykjavik's many restaurants, and reflect on your amazing trip to Iceland.

I hope this itinerary helps you plan your trip to Reykjavik!