Zagreb is the capital city of Croatia, located between the Sava River and Mount Medvednica. It is an old city comprised of two historic hills, Gradec and Kaptol, that were once surrounded by walls and towers. Zagreb has many attractions including the Zagreb Cathedral, St. Mark's Church, Medvedgrad Fortress, and the Croatian National Theater. It is known for Jelačić Square, the Blue Tram, the zoo, and the funicular. Zagreb is also home to many museums and famous people, and is loved for its greenery and parks.