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Stone description: porous
| Wall Number | Country Sort descending | State | Classification | Source |
|---|---|---|---|---|
| 13LB29 | Italy | Limestone | Leghorn | |
| 6RB37 | Mexico | Tuff | Oaxaca State | |
| 10LA38 | Mexico | Dacite | Mexico State | |
| 8RB36 | Scotland | Sandstone | Nairn | |
| 8LB36 | Scotland | Sandstone | Thurso | |
| 11LB28 | Scotland | Sandstone | Ballochmyle | |
| 13RA35 | Spain | Limestone | Murcia, Murcia | |
| 11LA2 | United States | Michigan | Dolomite | Raisinville |
| 13RA47 | United States | Alabama | Limestone | Rockwood |
| 5LA13 | United States | Ohio | Sandstone | New Lisbon |
| 6LA5 | United States | Pennsylvania | Sandstone | Scranton |
| 7RA31 | United States | Colorado | Sandstone | Coal Creek |
| 8RB20 | United States | Ohio | Sandstone | Middleburg Twp. Cuyahoga Co. |
| 9RB21 | United States | Ohio | Sandstone | Berea |
| 10LA11 | United States | Ohio | Dolomite | Lima |
| 12LA16 | United States | Iowa | Dolomite | Maquoketa |
| 15WE | United States | Ohio | Sandstone | Glenmont |
| 5RA3 | United States | Ohio | Sandstone | Bellaire |
| 6RB30 | United States | California | Sandstone | Alameda |
| 8LB21 | United States | Ohio | Sandstone | Steubensville Jefferson Co. |
| 9LB22 | United States | Ohio | Sandstone | Mansfield |
| 11LA33 | United States | Ohio | Limestone | Lumberton |
| 13RA7 | United States | Minnesota | Dolomite | Mankato |
| 5LA15 | United States | Ohio | Sandstone | Rockville |
| 6La9 | United States | Pennsylvania | Sandstone | Waynesburgh |
| 7RA39 | United States | New Jersey | Sandstone | Belleville |
| 8RB21 | United States | Ohio | Sandstone | Amherst |
| 10LA18 | United States | Iowa | Limestone | Marshalltown |
| 12LA35 | United States | Indiana | Limestone | Spencer |
| 16C | United States | Alabama | Limestone | Rockwood |
| 5RA34 | United States | Connecticut | Conglomerate | Portland |
| 8LB28 | United States | New York | Sandstone | Hulberton |
| 9LB23 | United States | Ohio | Sandstone | Marietta |
| 11La38 | United States | Tennessee | Sandstone | Parksville |
| 13RB10 | United States | Ohio | Dolomite | Sandusky |
| 5LA16 | United States | Ohio | Sandstone | Windsor |
| 6LB11 | United States | Pennsylvania | Sandstone | Sharon |
| 7RA42 | United States | Michigan | Sandstone | Marquette |
| 8RB32 | United States | Texas | Sandstone | Back Bone Valley |
| 10LA25 | United States | Kansas | Limestone | Greeley |
| 12LA8 | United States | Minnesota | Dolomite | Frontenac |
| 17WE | United States | Ohio | Sandstone | McDermott |
| 5RA4 | United States | Ohio | Sandstone | Buena Vista |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 8LB31 | United States | Kentucky | Sandstone | Cloveport |
| 11La40 | United States | Tennessee | Sandstone | Sewanee |
| 13RB16 | United States | Iowa | Dolomite | Farley |
| 5La17 | United States | Ohio | Sandstone | Wooster |
| 6LB12 | United States | Pennsylvania | Sandstone | Norristown |
| 7RA44 | United States | New Mexico | Sandstone | Las Vegas |
| 8RB33 | United States | Colorado | Sandstone | Fort Collins |
| 9RB32 | United States | Missouri | Sandstone | Meadville |
| 12LB14 | United States | Missouri | Dolomite | Osage |
| 18WE | United States | Ohio | Sandstone | McDermott |
| 5RA5 | United States | Ohio | Sandstone | Marietta |
| 6RB5 | United States | Pennsylvania | Sandstone | Greenville |
| 8Lb32 | United States | Texas | Sandstone | Riverside |
| 11LA6 | United States | Minnesota | Dolomite | Kasota |
| 13RB39 | United States | Illinois | Limestone | Columbia |
| 5LA18 | United States | Ohio | Sandstone | Plymouth |
| 6LB13 | United States | Pennsylvania | Sandstone | Beaver Falls |
| 8RB35 | United States | Connecticut | Sandstone | Portland |
| 9RB34 | United States | Alabama | Sandstone | DaKalb County |
| 12LB22 | United States | Kansas | Limestone | Junction City |
| 19WE | United States | Ohio | Sandstone | McDermott |
| 5RA6 | United States | Ohio | Sandstone | Howard Station Knox Co. |
| 6RB7 | United States | Pennsylvania | Sandstone | Cannonsburgh |
| 8LB33 | United States | Colorado | Sandstone | Canon City |
| 9Lb34 | United States | Oregon | Sandstone | Jacksonville |
| 11LB11 | United States | Ohio | Dolomite | Riley Twp. Putnam Co. |
| 13RB42 | United States | Indiana | Limestone | Bedford |
| 5LA19 | United States | Ohio | Sandstone | Mt. Gilead |
| 6LB20 | United States | Ohio | Sandstone | Sunbury |
| 9RB35 | United States | West Virginia | Sandstone | Charleston |
| 10La9 | United States | Kansas | Dolomite | Marion Center |
| 12LB35 | United States | Indiana | Limestone | Bedford |
| 1RQ | United States | Ohio | Sandstone | Amherst |
| 5RA7 | United States | Ohio | Sandstone | Lewis Mills |
| 6RB8 | United States | Pennsylvania | Sandstone | Black Walnut |
| 8LB34 | United States | Minnesota | Sandstone | Mendota |
| 9Lb37 | United States | Oregon | Sandstone | Forest Grove |
| 11LB12 | United States | Ohio | Dolomite | Eaton |
| 13WE | United States | Ohio | Sandstone | McDermott |
| 5La2 | United States | Ohio | Sandstone | Norwalk |
| 6LB21 | United States | Ohio | Sandstone | Millersburg |
| 7RB19 | United States | Ohio | Sandstone | Amherst |
| 8RB39 | United States | New Jersey | Sandstone | Little Falls |
| 9RB36 | United States | New Jersey | Sandstone | Belleville |
| 10Lb19 | United States | Pennsylvania | Sandstone | Stoop's Ferry |
| 12RA1 | United States | Indiana | Limestone | Bedford |
| 1WE | United States | Texas | Limestone | Cedar Park |
| 5RA9 | United States | Ohio | Sandstone | Belleville |
| 6RQ | United States | Ohio | Sandstone | McDermont |
| 8LB35 | United States | Connecticut | Sandstone | Manchester |
| 9LB40 | United States | Indiana | Sandstone | French Lick Twp. |
| 11LB22 | United States | Kansas | Limestone | Cottonwood |
| 14C | United States | Indiana | Limestone | Bedford |
| 5LA28 | United States | Kentucky | Sandstone | Grayson Spgs |
| 6LB3 | United States | Pennsylvania | Sandstone | Oil City |
| 7RB20 | United States | Ohio | Sandstone | Independence |