Ukraine is located in Eastern Europe, bordering several countries. It has varied terrain including plains, mountains like the Carpathians, and the Crimean Mountains. The main river is the Dnieper River, which provided hydroelectric power and was important to the development of Ukrainian and Russian peoples. Ukraine has a moderate climate with mild winters and hot, dry summers well-suited for agriculture. The capital is Kyiv, located on the Dnieper River with around 3 million citizens, known for its architectural and cultural landmarks and as a tourist destination.