The Shrine to Unreason was a venerated site on the planet Vrinda. A main feature of the shrine was a twenty-story tower.
Advisor Ezno Clyvans used the shrine's tower in 2376 to transmit a signal to Starfleet Headquarters, shortly before being killed by government forces. The top two levels of the tower were destroyed in the assault.
The tower of the Shrine to Unreason was also the site where the leaders of the Varden government and the dissident Nansen met days later to declare peace. (SCE eBook: Age of Unreason)