Ivan Vazov National Theatre
This is probably the most standard location to take a picture in Sofia, but there is a reason behind it. Tthis building is so spectacular that you will want to carry the memory home with you. It is an example of neoclassical architecture, and it was finished in 1907 (though it was reconstructed in 1929). Observe carefully the elements of the building and afterward, you can take a great picture in front of it or in front of the fountains that are just opposite the theater.