San Juan de Gaztelugatxe (Bermeo, Spain)
This Spanish island features a little church dedicated to John the Baptist, but fans of the TV series “Game of Thrones” know it as Dragonstone, the seat of House Baratheon. The large castle that’s seen in this location on the show isn’t really there; it’s added digitally in post-production. But that hasn’t stopped tourists from visiting in droves. And it’s ruining the landmark. Authorities worry that the ancient ground can’t withstand so many feet.