The Ryazan Kremlin is a historic fortress located in the city of Ryazan, Russia. It dates back to the 16th century and served as a significant military and administrative center. The Kremlin features impressive architecture, including the Assumption Cathedral, which is known for its beautiful frescoes and distinctive blue domes. Today, the Ryazan Kremlin is a popular tourist attraction and a UNESCO World Heritage site. Visitors can explore its ancient walls, towers, and museums, which showcase the rich history and culture of the region. The site offers a glimpse into Russia's past and its architectural heritage.