Complex sentence: Vindija is a cave near the city of Varaždin, Croatia, known for being the site of one of the best preserved remains of Neanderthals fossils in the world, found in 1974.
Split into simpler sentences: Vindija is a cave near the city of Varaždin, Croatia. The cave contains one of the best preserved remains of the Neanderthals in the world, found in 1974.