Osaka Castle Park is a sprawling public urban park and historical site located in the heart of Osaka. Covering approximately 106 hectares, it is the second-largest park in the city and serves as a major green lung for residents and tourists alike. The park surrounds the iconic Osaka Castle keep and is enclosed by massive stone walls and moats. While the castle museum itself has an entry fee and specific hours, the park grounds are open 24 hours a day and are free to the public.

• •Best Time to Visit: Late March to early April for cherry blossoms; February for plum blossoms; autumn for colorful maple and ginkgo leaves.
• •Accessibility: The park is easily accessible via several stations, including JR Osakajokoen Station (JR Loop Line), Morinomiya Station (Subway & JR), and Tanimachi Yonchome Station (Subway).
• •Facilities: The park includes jogging tracks, a baseball field, several food stalls, and the 'Jo-Terrace Osaka' shopping and dining complex near Osakajokoen Station.