Fabra Observatory is an astronomical observatory designed by Josep Domènech i Estapà. It was built in 1901 at the initiative of Camil Fabra, Marquis of Alella. Beside it is La Mentora Museum of Experimental Physics, designed by Ferran Alsina, dating from 1905.

Today Fabra Observatory continues its work on scientific research into the three branches for which it has been known over the last 100 years: meteorology, seismology and astronomy.  Its location at 413m above sea level, among pine trees and with an uninterrupted horizon, have enabled it to continue as a focus of interest in the worlds of meteorology and astronomy.