The Tower of Fate is a fortress and a beacon of magical power that serves as a nexus point between all realities. It exists outside the material universes' time and space; because of this, it can't be destroyed in any meaningful manner, only suffering temporary harm to its aspects until it repairs itself. Due to its nature as an extra-dimensional nexus, it accesses the 'subtle realms' beyond conventional space and time. It is a crossroads present in every dimension and on every plane of consciousness. Inside the tower, space and time are fluid and can be controlled by its Master.
The interior of the Tower is a labyrinth, containing living quarters, a vast Mystical Library, Alchemical & Ritual rooms and many Artifacts of power. However, the most significant aspect of the Labyrinth is that it has doorways to every corner of the Multiverse, including known and unknown dimensions.
The Tower possesses numerous natural magical protections to ward against Teleportation, Scrying, Divinations, portals, and wards, along with protective barriers against malevolent forces. These defenses prevent anyone other than the Master from entering the Tower of Fate without permission. These protections have proven sufficient to resist the powers of magicians like Zatanna Zatara and John Constantine, keep out physical powerhouses like Power Girl and Black Adam, or technological threats like Blue Beetle and Cyborg. This demonstrates that while these protections are mystical, they can withstand magical energies, physical forces, and esoteric alien energies. Only powers such as Chaos Magic and Hourman's Timeship from the 853rd Century have proven strong enough to penetrate its defenses.