Holwert Grândyk
| Key | Value |
|---|---|
| architect | Maatschappij tot Landaanwinning op de Friesche Wadden |
| historic | ruins |
| historic:period | 1872-1882 |
| material | stone |
| name | Dam Holwerd-Ameland |
| ruins | dyke |
| seamark:obstruction:category | foul_area |
| seamark:type | causeway |
| start_date | 1872 |
| tidal | yes |
| wikidata | Q13134580 |
| wikipedia | nl:Dam Holwerd-Ameland |
