LA CITADELLE OF QUEBEC IS BUILT ON THE CAP DIAMANT, THE HIGHEST NATURAL POINT OF OLD QUEBEC. GUIDED TOURS OF LA CITADELLE AND THE ROYAL 22E RÉGIMENT MUSEUM OFFER A COMPREHENSION OF TERRITORIAL SPACE AND DEFENSE ORGANIZATION, VISIT OF EXHIBITIONS AND A WONDERFUL VIEW OF THE CITY AND SAINT LAWRENCE RIVER. THIS CITADEL IS THE MOST IMPORTANT BRITISH FORTIFICATION OF NORTH AMERICA. LA CITADELLE OF QUEBEC IS A NATIONAL HISTORICAL SITE.