Resurrecting this thread again. We have two nights in Sofia in late April and will welcome any particular places that we should visit. So really one full day. We'll be staying at the Hilton.

We plan to take the Metro from airport to European Union station. We arrive at terminal 2. Does this sound reasonable? Do I need to get a Sofia Smart Card and load with money or can I directly use my debit card (as in London, Singapore)? Preloading a card must mean I need to estimate how much I will use.

From Sofia we plan to take a bus to Skjope. I need to check details of the bus. I believe Matpu have a service around 9am. Not sure where to buy a ticket from yet.

Any advice is welcome.