The National Interest Land Mass.

 "Land forming part of the NILM will be retained by the National Capital Commission on behalf of the government in perpetuity, for purposes which lie at the core of the NCC's mandate." (1988-09-15-TB-re-NCC Land Holdings.)

Quebec

• Gatineau Park, 32,000 ha (approx)
• 3 parcels, Ottawa River shoreline at Portage Bridge & land beside Eddy Street
• Parts of Laurier St in front of Place du Portage
• Ottawa River shoreline at the Alexandra Bridge approach
• Hull Wharf Ottawa River water lot only
• Museum site Laurier Ave
• Ottawa River shoreline south of Brewery Creek
• 4 parcels, Jacques Cartier Park
• Ottawa River shoreline proposed Voyageur Parkway
• Leamy Lake and part of the Philemon Wright Corridor

Ontario

• The Greenbelt, 14,000 ha or 34 thousand acres
• GG's residence (Rideau Hall)
• PM's residence 24 Sussex Drive
• Rideau Gate (Guest House)
• Central Experimental Farm, 960 Carling Avenue in Ottawa. "The CEF National Historic Site is designated in its entirety as part of the National Interest Land Mass." (From: Central Experimental Farm NHS Management Plan, Part 7/20.)
• Greenbelt Research Farm, 1740 Woodroffe Avenue, Nepean
• Shoreline behind Parliament Hill - 2.91 ha
• Chambers Bldg. Elgin and Queen - 0.27
• Confederation Square - 0.15
• Part of Lebreton Flats N of Transitway - 65.37 ha
• Victoria Island - 6.35 ha
• Pts of Wellington in front of Chateau Laurier and the Conference Centre and land to the E of the Conference Centre. Also lands N of Wellington between the Rideau Canal Locks & the Chateau Laurier & Major Hill Park. Also the approach to Alexandra Bridge & the new Art Gallery site.
• Lady Grey Drive and the Ottawa River W of Sussex Drive
• Daly Building corner of Rideau & Sussex
• 8 parcels of land E of Sussex (Mile of History) from Rideau Street to MacDonald Cartier Bridge
• Pt of the Mint property W of Sussex Drive
• Small park on W side of Sussex Drive S of MacDonald Cartier Bridge. 
• Parking lot at Earnscliffe and water lot
• 4 parcels on the Rideau River around City Hall
• 4 parcels E of Sussex Drive between Stanley Ave & Rideau Gate
• Ottawa River Parkway, Wellington Street to Carling Ave
• Champlain Bridge, Island Park Drive
• Rideau Canal lands from downtown to Hog's Back Road - 90 ha or 222 acres
• Rideau River lands from Green Island to Revelstoke Dr
• Airport Parkway
• Eastern Parkway Hemlock Rd to Hwy 417
• Eastern Driveway and Rockcliffe Park from Sussex Drive to Greenbelt
• Lower Duck Island Ottawa River