Azerbaijan is a country that was part of the Soviet Union and is now an independent nation. It is located between the Caspian Sea and the Caucasus Mountains, which stretch across both Asia and Europe. The capital city, Baku, is known for its old walled area from medieval times. Inside this city, you can find the Palace of the Shirvanshahs, which was a royal place built in the 15th century, and the Maiden Tower, a very old stone structure that stands tall and is a main feature of the city’s skyline.