Agra Fort, a UNESCO World Heritage site in Agra, Uttar Pradesh, India. It is about km northwest of its more famous sister monument, the Taj Mahal. The fort can be more accurately described as a walled city. (built before Red Fort Agra by ~CitizenFresh
Predjamski Castle: Integrated in a Cave llama Castle’ (Slovene: Predjamski grad or Grad Predjama, German: Höhlenburg Lueg, Italian: Castel Lueghi) is a Renaissance castle built within a cave mouth in[.