Chronicles of Time
The towers consists of 3 levels. The top Level of the tower is the observatory, which is encased by a great crystal dome. Outside the tower, is the a plane of unstable energies. The tower obviously exists in a small pocket dimension of some sort.
The 2nd level of the tower houses two bedrooms, a kitchen, and a restroom.
The bottom level varies depending on Tower.
Tower 1 will find a forge suited to making items and gadgets.
Tower 2 will find an alchemy lab and study.
Mystery seems to possess at least 2 of these towers which are nearly identical.