Pedestrians stroll along a leafy sidewalk alongside the historic stone ramparts of the Seoul City Wall, with lush green trees and central Seoul city buildings in the background.

A golden-roofed Gozabune pleasure boat carries passengers along the castle moat, offering a spectacular low-angle view of the massive stone walls and the main tower of Osaka Castle under a bright blue sky.

A classic white plastered watchtower turret sits on the corner of a massive stone defense wall rising steeply out of the castle moat under a clear sky.

The majestic white and gold main tower of Osaka Castle stands tall above towering stone defensive ramparts under a clear, bright spring sky.

Delicate white dogwood flowers bloom beautifully on overhanging branches in the foreground, framing a soft-focus view of the grand Osaka Castle keep rising over its historic stone wall under a bright sky.

A scenic view of the magnificent Osaka Castle rising above a historic stone defensive wall and defensive moat, framed elegantly by delicate spring leaves on overhanging branches.

A classic golden-roofed pleasure boat cruises along the calm waters of the castle moat, backed by massive stone walls, green trees, and the iconic Osaka Castle.

A rustic stone wall made of rough, dark rocks provides a textured foreground to a picturesque scene. Beyond the wall, a vast field is covered in a blanket of small white flowers. Lush green trees form a backdrop to the field, adding depth and contrast. The image captures the beauty of a simple, natural landscape.