Vyborg Castle is a medieval fortress located in Vyborg, Russia, near the country's border with Finland. The castle was built in the 13th century by the Swedes and later fell into the hands of the Russians. It served as a crucial defensive structure for both the Swedish and Russian armies, witnessing several battles over the centuries. Today, Vyborg Castle is a popular tourist destination, offering visitors a glimpse into its rich history through guided tours and exhibitions showcasing artifacts and historical documents.