Start your second day by visiting Osaka Castle, a magnificent historical landmark. Explore the castle grounds, learn about its rich history, and enjoy the beautiful gardens surrounding it. Afterward, make your way to Dotonbori, a vibrant and bustling street known for its lively atmosphere and delicious street food. Try local specialties like takoyaki and okonomiyaki while immersing yourself in the vibrant neon lights and iconic billboards. Don't forget to take a stroll along the Dotonbori Canal and capture some memorable photos.