The San Diego Museum of Man will be closing its iconic California Tower to the public, so the City of San Diego can do a seismic retrofit of the historic structure. The work will begin in January of 2019 and last up to seven to 10 months

For more info, please read the original article by Times Of San Diego:
https://timesofsandiego.com/life/2018/10/31/california-tower-in-balboa-park-closing-for-seismic-retrofit/