Built in 1887 by the sea, this old mansion takes its name from the limestone rocks that line the coast from Cassis to Marseille. Situated after the marina, it enjoys a unique location, between the village and the Calanques, with a breathtaking view of the majestic cliff of Cap Canaille. It was only in the early 1920s that the property was transformed into a hotel and opened to the public. Winston Churchill, and later Edith Piaf, stayed there.

From this period, the building retains some beautiful elements of Art Deco architecture: its wrought iron entrance framed by columns, two balconies with worked corbelling, and an astonishing banister with a scaly motif, where the initials RB for Roches Blanches stand out on the first floor. During the 20th century, the hotel was remodelled and enlarged several times.