The Cultural Landscape Foundation has released a list of 12 threatened or at-risk landscapes. Here is a look at the 12 sites:

- Cathedral of the Immaculate Conception in Burlington, Vt. - The landscape includes a grid of 123 uniformly spaced locust trees to screen the church from the city. Construction of a proposed bus terminal would remove part of that landscape.

- Fern Dell in Los Angeles' Griffith Park - This 90-year-old landscape blends natural and manmade features as a unique public fern garden. Regular maintenance ended in the 1970s.

-Garland Farm in Maine - This was the last home and garden of noted landscape architect Beatrix Farrand. Financial difficulties have stunted the completion of a planned restoration.

- Hannah Carter Japanese Garden in Los Angeles - This site now owned by the University of California Los Angeles has been listed for sale. Heirs of the garden's previous owner sued to block the sale because it was a gift to the school.

- Innisfree Garden in Millbrook, N.Y. - This 150-acre public garden was created as an American, Modernist twist on ancient Chinese landscape design. Funding shortfalls threaten its preservation.

- Isham Park in New York City - This public park suffers from deferred maintenance and has become overgrown in places, obstructing planned views of the Hudson River.

- Jack London Lake in California's Sonoma Valley - This California State Park has sunk into decline with a leaking dam and has been slated for closure. A private group secured a contract to operate the park this year and is working to raise money for restoration.

- Jones Beach State Park in New York - This popular public beach was designed in the 1920s as a premiere seaside park and served as a model for other state parks. Deferred maintenance has slowly led to its decline.

- Nasher Sculpture Garden in Dallas - Construction of a glass skyscraper nearby is casting a shadow over the gardens and disrupting the flow of sunlight into a museum that's part of the site.

- Pennsylvania Avenue in Washington, D.C. - Deferred maintenance has left small parks and enhancements along the avenue in disrepair after an earlier revitalization effort by President John F. Kennedy.

- Riverbank Park in Flint, Mich. - The park represents a landscape-as-infrastructure approach by Lawrence Halprin to control flooding.

- Thieme Drive in Fort Wayne, Ind. - A 1982 flood led to deterioration in this historic Beaux-Arts park, along with new flood walls and levees.