Nagoya Castle: One of the Largest
Air raids in 1945 wiped out pretty much everything, but the castle keep was rebuilt in 1959.
Nagoya Castle is open 9:00-16:30, and admission is 500 yen. You can't go on the scaffolding on Tuesdays or Thursdays, or during lunchtime (12:00-13:00). Nagoya Station isn't exactly the central hub that other cities' main stations are so a couple main subway lines don't go to Nagoya; to get to the castle from there requires changing subway lines at Sakae Station. From Shiyakusho Station, it's a three minute walk to the castle park's entrance.