I'm going to be visiting Sofia for the 2nd time in a couple of weeks, I'll be staying with my friend who lives in the city.

Last time I was in your city (last July) I took a short one night trip to Plovdiv, visited the Rila lakes, hiked to Cherni Vrah, and ate at Tenebris with my friend - genuinely one of my favourite holidays ever!

This time, I'll be in the city for 2.5 days, and so far the only thing we have planned is for me to take my friend to Cosmos as a thank you for putting me up.

I'm ideally looking for some ideas for fun and memorable things to do that even someone who has lived in the city might not have experienced! We like food, nature and are generally a bit on the nerdier side of the spectrum.