Europe is the 6th largest continent, located primarily in the northern and eastern hemispheres, consisting of 51 countries with Russia being the largest and Vatican City the smallest. The continent is known for its diverse physical geography, including major peninsulas, mountain ranges such as the Alps, and significant rivers like the Danube and Rhine. Europe is bounded by the Arctic Ocean, Atlantic Ocean, Mediterranean Sea, and features various seas and natural straits that have crucial economic and transport significance.