Rasmus Petersen, a Danish immigrant who settled in Central Oregon in the early 1900s at age 17, began constructing the rock garden on the grounds of his family home in 1935.
The "eccentric" farmer used rocks that he found within an 85-mile (137 km) radius.
He attempted to evoke his native country with his designs, but also created monuments to the United States, including a concrete American flag and a 7-foot (2.1 m) replica of the Statue of Liberty.
Petersen incorporated other design elements such as bridges, water features (lagoons, lily ponds and streams) and natural landscaping.
He worked on the garden until his death in 1952; the garden has remained in his family's care since then.
A bronze plaque in front of the Statue of Liberty replica reads: "Enjoy yourself: it's later than you think."
Petersen's Rock Garden became known as Petersen Rock Garden in the mid-1950s.
At its height, supported by traffic from the Old Bend-Redmond Highway, the garden drew approximately 150,000 visitors a year.

The garden is managed and owned by Petersen's grand-stepdaughter, Susan Caward, and her family, who has struggled to maintain the lawns and dozens of sculptures.
In 2011, the garden was named one of Oregon's Most Endangered Places by the Historic Preservation League of Oregon (now known as Restore Oregon).
The "Endangered Places" program raises awareness of the state's "historic treasures in need of the advocacy and support to save them from demise".
According to the League, the deteriorating garden needed "maintenance, a business plan and a publicity campaign to ensure stewardship and funds are available to overcome vandalism, theft, and condition issues".
In 2012, a contractor accidentally damaged one of the stone bridges, catalyzing an effort to document the garden using laser scanning and other technologies.
The Portland-based company i-Ten measured and archived the site's geospatial data, allowing potential future rebuilding to match the original construction.

The garden was closed from February 1 through May 24, 2013 to undergo repair and review for listing on the National Register of Historic Places.
The family and ten volunteers worked for nearly six months to restore the grounds.
The cleanup process included the removal of dead vegetation and junk from outbuildings, and an estate sale that included items from before Petersen's death.
On May 25, 2013, Petersen Rock Garden hosted its "grand reopening".
The opening was attended by members of the Confederated Tribes of Warm Springs, who sang and blessed the garden.
Caward has considered opening a cafe on the grounds, and turning the family home into a bed and breakfast.
Owen Evans, a friend of the family who has assisted with the restoration, has also envisioned a museum reorganization, a small amphitheater to host outdoor concerts and other events, and additional rock sculptures mimicking Petersen's style.

Petersen Rock Garden was added to the National Register of Historic Places on October 30, 2013.
Rasmus Petersen, a Danish immigrant who settled in Central Oregon in the early 1900s at age 17, began constructing the rock garden on the grounds of his family home in 1935. The "eccentric" farmer used rocks that he found within an 85-mile (137 km) radius. He attempted to evoke his native country with his designs, but also created monuments to the United States, including a concrete American flag and a 7-foot (2.1 m) replica of the Statue of Liberty. Petersen incorporated other design elements such as bridges, water features (lagoons, lily ponds and streams) and natural landscaping. He worked on the garden until his death in 1952; the garden has remained in his family's care since then. A bronze plaque in front of the Statue of Liberty replica reads: "Enjoy yourself: it's later than you think." Petersen's Rock Garden became known as Petersen Rock Garden in the mid-1950s. At its height, supported by traffic from the Old Bend-Redmond Highway, the garden drew approximately 150,000 visitors a year.
The garden is managed and owned by Petersen's grand-stepdaughter, Susan Caward, and her family, who has struggled to maintain the lawns and dozens of sculptures. In 2011, the garden was named one of Oregon's Most Endangered Places by the Historic Preservation League of Oregon (now known as Restore Oregon). The "Endangered Places" program raises awareness of the state's "historic treasures in need of the advocacy and support to save them from demise". According to the League, the deteriorating garden needed "maintenance, a business plan and a publicity campaign to ensure stewardship and funds are available to overcome vandalism, theft, and condition issues". In 2012, a contractor accidentally damaged one of the stone bridges, catalyzing an effort to document the garden using laser scanning and other technologies. The Portland-based company i-Ten measured and archived the site's geospatial data, allowing potential future rebuilding to match the original construction.
The garden was closed from February 1 through May 24, 2013 to undergo repair and review for listing on the National Register of Historic Places. The family and ten volunteers worked for nearly six months to restore the grounds. The cleanup process included the removal of dead vegetation and junk from outbuildings, and an estate sale that included items from before Petersen's death. On May 25, 2013, Petersen Rock Garden hosted its "grand reopening". The opening was attended by members of the Confederated Tribes of Warm Springs, who sang and blessed the garden. Caward has considered opening a cafe on the grounds, and turning the family home into a bed and breakfast. Owen Evans, a friend of the family who has assisted with the restoration, has also envisioned a museum reorganization, a small amphitheater to host outdoor concerts and other events, and additional rock sculptures mimicking Petersen's style.
Petersen Rock Garden was added to the National Register of Historic Places on October 30, 2013.
Petersen Rock Garden