During my visit in Barcelona, I walked into this street called Bitcoin street. I took some pictures of it and found it interesting so I did some research.
The street was launched in 2017 and the original idea came from Madrid. It is a street with multiple vendors that accept Bitcoin as payment. The intention was to promote consumers using Bitcoin as a form payment.
You can read more about it here: https://www.bbva.com/en/second-bitcoin-street-country-created-barcelona/
I went there on a Sunday so all the stores were closed. But the shutters had some neat Bitcoin art on them so I took pictures of those.