Iceland
Iceland is a fantastic place for a long weekend.
You have plenty to do: Quad biking, Snow mobile , Blue lagoon, Northern lights , Geyser , Waterfalls , Dry diving
I highly recommend a long weekend if you like a bit of eventyr and fun
Food was fantastic
Northern lights: best time to go is between September and March
https://website.lineone.net/~polar.publishing/geysersoficeland.htm