LITOCHORO, Greece — Snow-capped for much of the year, Mount Olympus, mythological home of ancient Greece's 12 Olympian gods, has captured the imagination through the millennia. Rising to 2,918 meters (9,573 feet) from a base practically at sea level, the ancient Greeks believed the throne of Zeus, king of the gods, stood on the highest of its craggy, often mist-shrouded peaks.