United States National Register of Historic Places |
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Research Cave
| NRHP ID: 66000415 |
| Wikidata ID: Q7315062 |
| Wikpedia: Research Cave |
| Location (in/near): Portland, Missouri |
| Listed: 1966-10-15 |
| Role: Site |
| Significance region: National |
| Significance area(s): Prehistoric |
| Criteria: D (information potential) |
Data from United States Park Service and Wikidata