Karlstejn Castle, Czech Republic

Perched atop a rocky hill amidst lush greenery under an overcast sky, Karlstejn Castle stands as one of the most impressive Gothic castles in Central Europe. This UNESCO World Heritage Site was built by King Charles IV between 1348 to 1355 for safekeeping the crown jewels and other relics of great importance to the country. Its formidable architecture features towering spires, intricate stonework, and defensive battlements that offer panoramic views of the surrounding countryside. Flags flutter gently at its entrance, adding life against this historic backdrop.