When excavations were made to build the access ramp to the parking area, train rails were found. These rails were found arranged perpendicularly in the sandy sediment.
This finding was related to the tsunami of August 1868 that struck the coasts of Arica and devastated the “Maestranza del Ferrocarril Arica Tacna Railway” (“Arica Tacna Railway armory”), which was located meters west of Mall Plaza Arica.
There are records of trains that were in the armory at the time of the tsunami, and that were never found again, as they were washed away by the waves and covered by the sandy sediments carried by the force of the sea. It is probable that the discovery of those rails in the excavations, corresponds precisely to the remains of the armory, moved by the effect of the tsunami.