Thanks to @NatureMC (https://mastodon.online/@NatureMC/114160779335185317), we discovered Postcrossing, a nice online platform for sending and receiving postcards.
This platform was founded in 2005 in Portugal by Paulo Magalhaes
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He loved receiving postcards and letters in his mailbox, but didn't know how to make it happen, so he created Postcrossing as a side project.
20 years later, more than 80 million real postcards have been sent through the platform!
Postcrossing has more than 800.000 members from all over the world!
It's free and incredibly simple to participate: you just need to subscribe, get a random address, send a postcard to this person and when they receive it, they must indicate that in the platform.
After that, your address will be randomly sent to someone else, and a few days later, you'll receive a surprise postcard in your mailbox!
So why not stop scrolling and go send a postcard of your city or country to someone, anywhere in the world?
https://www.postcrossing.com/