The next day we went hiking again. We started from Alan (yep, we reached it the easier way - by car). We wanted to do a mild ascent, like 2-3 hours of walking. We looked at a map and chose one of the routes that looked suitably.
We walked and walked and walked. Up, down, up, down... No sign of the turn right we saw on the map. At some point I got pretty tired and started being a bit anxious that we lost our way. But no, we didn't. It turned out that the route we reckoned to be for 10 km was a 20 km one.
At some point we reached a summit we were aiming for. It was actually pretty cool, with a real mountain shelter inside, equipped with food, stove, dice and rainwater.
By the shelter we met a group of spelaeologists from Bulgaria who were there on a caving expedition. Wow, that's exciting. We talked to them for a while and went back to Alan. We wanted to reach our car before the sunset. You can find the route on my Endomondo.