In Sofia, you can explore Borisova Gradina, a large and scenic park, visit the Sofia Zoo, one of the oldest and largest in the Balkans, and delve into history at the Sofia History Museum. Discover ancient Roman ruins at the Serdika Archaeological Complex, and enjoy performances at the Sofia Opera and Ballet. Don't miss the stunning Alexander Nevsky Cathedral, vibrant Vitosha Boulevard, and the National Palace of Culture. Experience the medieval frescoes at Boyana Church and admire the architecture of the Sofia Central Mineral Baths.