I also found a wallet once while traveling in Germany!
I was sitting on a bench in a city square - enjoying the weather,watching people...when I saw a black wallet laying at the end of the bench!
I picked it up,opened it and the first thing I noticed was a drivers license of a girl. I examined the picture and the information on the license. She was attractive and in mid 20's. There was around 150 Eur in cash and some plastic as well.
I set there and thought what to do for a moment.The weather was gorgeous, I was all alone in the city and I felt I could use a friend
My imagination was running wild painting the picture of the attractive girl thanking me for returning her wallet, perhaps inviting me out to show her city,maybe introducing me to some friends - possibilities were endless...
I had a smartphone on me with internet access ( I always get a local sim card when I travel) - so I found the girl on Facebook and shot a short message : Hi..I found your wallet,I am in the park...come out and pick it up. Here's my number.
Five minutes later the girl called me -we spoke in English as my German was shit - and she said she will come in 15-20 min. She sounded kind of rude on the phone and her English was pretty bad too.
Anyways...25 min later I see a couple ( a guy and a girl) ,they seem to be looking for someone. The girl came with her boyfriend...The saw me and I gave them the wallet all happy. She opened it and said there was more money in it! She said she was sure she had at least 50-100 Eur more in it! She kind of looked pissed and looking at me sort of expecting me to pull out another 50 from my pocket!
I appealed to the guy to use his logic and explained if I wanted to steal her money I would have taken it all without any risk! Why would I call her and take only a 50? He relayed the information to the stupid bitch...but they were still looking at me like I was the thief!
At this point I got pissed and told them I got nothing else to tell them...and walked away!
So you never know how things turn out...