Inside the Kalemegdan Citadel in Belgrade lies a park full of history, stunning views, and a sense of tranquility away from the buzz of the city. We happen to be here on a Saturday when the sun is shining and winter is beginning to leave the city, early spring is making its mark. It’s the weekend of the Serbian National Holiday known as Statehood Day; remembering the country’s revolution against the Ottoman Empire and gaining independence. Historic Richness is mixed with nature as the sunlight casts itself over war paraphernalia and the Military Museum. Outside the citadel, the town is …