//
Photo: MrPanyGoff, CC BY-SA 3.0 via Wikimedia Commons
A large mineralogical museum. In the main hall is the world's biggest collection of Giant Crystals, with dazzling jagged rocks the size of refrigerators.
The Earth and Man National Museum is a mineralogical museum in the centre of Sofia, the capital of Bulgaria.
© OpenStreetMap contributors
The biggest congress center in the Balkans (a massive monolithic communist-style building). If asking for directions, ask for NDK (en-de-ka), as most Bulgarians refer to it by this acronym.
A nice park in the south-east part of the city, although a bit too crowded on weekends. Vibrant with open area cafes, entertainment for children and grown-ups, and a few ponds with ducks.