Sarajevo packs an unusual amount of history into a small, walkable center, which is why this shortlist matters more than a scattered itinerary. The Latin Bridge marks the spot where the 1914 assassination altered world history, while Baščaršija, the Sebilj Fountain, and Gazi Husrev-beg Mosque reveal the city's Ottoman-era character in a few compact blocks. The Vijećnica city hall shows the same neighborhood under Austro-Hungarian rule, and the Tunnel of Hope Museum, paired with a Sarajevo War and Siege tour, explains the 1990s siege that shaped the city today. A day trip to Mostar and the Stari Most rounds out the region beautifully.