I didn't know Sweden also has double-decker buses.

I always thought only the UK had double-decker buses in Europe, but I encountered one while traveling in Sweden. This time, I took a double-decker bus from Stockholm to the small town of Vaxholm. The bus even has charging ports, which is great. You can ride it with a transportation ticket, which is very convenient. Just scan your ticket when you board, and the frequency of the buses is not too sparse. Highly recommended.