Riva Tunnel of Monaco Boat Service

The Riva Tunnel, located at Avenue de La Quarantaine, 98000 Monaco, is a subterranean storage facility constructed in 1961 by Italian boat designer Carlo Riva. This 100-meter-long tunnel, situated beneath the Prince's Palace, was designed to accommodate Monaco Boat Service's expanding fleet of Riva motorboats. The project was completed with the approval of Prince Rainier III of Monaco. (riva-mbs.com) The tunnel remains a notable feature of Monaco's maritime heritage.