Azerbaijan is bounded by the Caspian Sea and the Caucasus Mountains, which span Asia and Europe. Its capital, Baku, is famed for its medieval walled Inner City. Within the Inner City lies the Palace of the Shirvanshahs, a royal retreat dating to the 15th century, and the centuries-old stone Maiden Tower, which dominates the city skyline. Many resources debate on it being an Asian or a European country, therefore both choices are valid.

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