Museum

The Museum is a location that appears "randomly" in the Plaza under Social and Knowledge. In it you will see 5 wings, which each have items for you to explore.

To have it appear, your account must be one day old. Once it is, it will randomly appear. Once you've seen the museum, you must wait 3 day for it to open again, and 7 days if you have all wings unlocked. Once those days pass it once again becomes RNG.