Sofia's city centre is very compact, which means that you can take in the sights in one day, or two if you visit the museums and churches. Take a look at our suggestions for making the most of your time: walks 1 to 3 are around the city centre, while walk 4 takes you to the suburb of Boyana to see the National History Museum and the UNESCO-listed Boyana church in the wonderful setting at the foot of Vitosha mountain.