Our stay in Osaka seems a bit like a whirlwind visit thinking about it now, though we did manage to cram in quite a bit. It helped that we bough the Osaka Unlimited Pass, available only to tourists and giving free access to many of the sights around Osaka including the following:

WTC Cosmo Tower Observation Deck
A large tower with a huge vantage point over the entire area giving you a good idea about what Osaka looks like from a bird’s eye view.

The Floating Garden Observatory
Another large tower, this time located in the northern part of Osaka. This one is stylish and comfortable on the inside and is definitely a great place to stay for twilight, only to see the city light up at night.

Osaka Maritime Museum
A museum that showcases Osaka’s important role as a harbour town and the role it’s played on society.

Osaka Castle
One of the most important castles that helped unify Japan a long time ago. It’s surrounded by lush gardens and is worth walking around even if you don’t go into the castle itself.