The Dark Tower Wiki

Doorways between worlds are found throughout Mid-World and Keystone Earth. These portals are found in two varieties: Magical and Mechanical.

Magical doorways can be formed either from the substance of the Prim, or from the magical tension between two people. Although typically determined by the mindset of whoever enters them, these doorways could lead to unpredictable wheres and whens.

Mechanical doorways, portals built by the Great Old Ones, are found throughout our world and Mid-World. Unlike magical doorways, these doors were created from a fusion of technology and magic by North Central Positronics and lead to predetermined wheres and whens.

Both varieties of doorways are utilized by Roland and his ka-tet, as well as their nemeses, throughout the Dark Tower universe and play pivotal roles in the stories resolution.

Known magical doorways:

Known mechanical doorways: