Slovakia is a small country in central Europe with an area of about 49,000 km2 and a population of around 5.38 million people. The capital and largest city is Bratislava, where Bratislava Castle serves as the official residence of the Slovak president. Some of the top geographic features include the High Tatras mountains, with Gerlach peak as the highest point, the Vah River as the longest, and the Gabčíkovo water power plant as the largest.