Petrified Sea Gardens | |
 Cambrian Period undersea grotto near park entrance, 2008 | |
   | |
| Location | Petrified Sea Gardens Rd., Saratoga Springs, New York |
|---|---|
| Coordinates | 43°4′58.97″N 73°50′40.16″W / 43.0830472°N 73.8444889°W |
| Area | 25 acres (10 ha)[1] |
| Built | 1825 |
| NRHP reference No. | 99000631 |
| Significant dates | |
| Added to NRHP | January 20, 1999[2] |
| Designated NHL | January 20, 1999 [3] |
| Designated NNL | April 1967 |
Petrified Sea Gardens, also once known as Ritchie Park, is a National Historic Landmark on Petrified Sea Gardens Road in Saratoga Springs, New York. It preserves a bed of ancient stromatolites in a Cambrian rock layer, which were the first to be recognized and understood for what they are. The site was a private park open to the public for many years, but is now closed. The site was designated a National Natural Landmark in 1967, and a National Historic Landmark in 1999.[3][4]
- ^ Cite error: The named reference
nrhpinvwas invoked but never defined (see the help page). - ^ "National Register Information System". National Register of Historic Places. National Park Service. January 23, 2007.
- ^ a b "Petrified Sea Gardens". National Historic Landmark summary listing. National Park Service. September 18, 2007. Archived from the original on June 6, 2011. Retrieved September 20, 2007.
- ^ "National Natural Landmarks - National Natural Landmarks (U.S. National Park Service)". www.nps.gov. Retrieved April 15, 2019.
Year designated: 1967