16th-century castle built by Toyotomi Hideyoshi, rebuilt in 1931. The 8-storey main keep houses a museum and observation deck. ¥600.
💡 Getting there: Osakajōkōen Station (JR Loop, 5 min walk) or Tanimachi 4-chōme (Metro). 🕐 9:00–17:00 (closes 17:30). 💴 ¥600 (park is free). 🌸 Sakura: ~3,000 cherry trees in the park (late March). Built by Toyotomi Hideyoshi in 1583, reconstructed in 1931. The 8-floor museum inside has Sengoku-era artifacts.