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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 | |
| 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 |
| 8RB40 | United States | New Jersey | Sandstone | Belleville |
| 9RB38 | United States | Oregon | Sandstone | Near Albany |
| 10LB20 | United States | Ohio | Sandstone | Lancaster |
| 12RA13 | United States | Ohio | Dolomite | Lima |
| 22EE | United States | Ohio | Sandstone | McDermott |
| 5RB1 | United States | Ohio | Sandstone | Amherst |
| 6WE | United States | Ohio | Sandstone | Amherst |
| 9LB41 | United States | Indiana | Sandstone | Williamsport |
| 11LB22 | United States | Kansas | Limestone | Cottonwood |
| 14LA12 | United States | Ohio | Dolomite | Yellow Springs |
| 5LA3 | United States | Ohio | Sandstone | Peninsula |
| 6LB30 | United States | Kentucky | Sandstone | Cloveport |
| 7RB25 | United States | New York | Sandstone | Margarettville |
| 8RB42 | United States | Montana | Sandstone | Columbus |
| 9RB39 | United States | Indiana | Sandstone | Paoli |
| 10Lb37 | United States | West Virginia | Sandstone | Grafton |
| 12RA16 | United States | Iowa | Dolomite | Farley |
| 23EE | United States | Idaho | Sandstone | Boise |
| 5RB2 | United States | Ohio | Sandstone | Canal Dover Tuscarawas Co. |
| 7C | United States | Indiana | Limestone | Bloomington |
| 8LB37 | United States | Missouri | Sandstone | Rockville |
| 9LB43 | United States | Washington | Sandstone | Tenino |
| 11LB26 | United States | Iowa | Sandstone | Lewis |
| 14LA14 | United States | Iowa | Dolomite | Mt. Vernon |
| 5LA4 | United States | Ohio | Sandstone | Norwalk |
| 6LB39 | United States | Ohio | Sandstone | Youngstown |
| 7RB28 | United States | California | Sandstone | Sites |
| 8RB44 | United States | Michigan | Sandstone | Isle Royale |
| 9RB40 | United States | Indiana | Sandstone | Attica |
| 10LB38 | United States | Colorado | Sandstone | Fremont Co.- Ark. River |
| 12RA32 | United States | Indiana | Limestone | Salem |
| 24EE | United States | Ohio | Sandstone | Glenmont |
| 5RB3 | United States | Ohio | Sandstone | Bedford |
| 7EE | United States | Ohio | Sandstone | McDermott |
| 8LB38 | United States | Arizona | Sandstone | Yavapai Co. |
| 9Lb44 | United States | Wyoming | Sandstone | Laramie |
| 14LA16 | United States | Iowa | Dolomite | Stone City |
| 5LA5 | United States | Ohio | Sandstone | Piketon |
| 6LB7 | United States | Pennsylvania | Sandstone | Yardleyville |
| 7RB30 | United States | Texas | Sandstone | Milsap |
| 8RB45 | United States | Wisconsin | Sandstone | Packwaukee |
| 9WE | United States | Ohio | Sandstone | McDermott |
| 10Lb46 | United States | Wisconsin | Sandstone | Mauston |
| 12RA36 | United States | Kentucky | Limestone | Garrett |
| 25WE | United States | Ohio | Sandstone | Amherst |
| 5RB4 | United States | Ohio | Sandstone | Bellaire |
| 7LA10 | United States | Florida | Limestone | Key West |
| 8LB39 | United States | West Virginia | Sandstone | Wheeling |
| 9RA12 | United States | Iowa | Limestone | Iowa City |
| 11LB29 | United States | Missouri | Sandstone | Jones Station Ralls Co. |