Normally, the 19th-century Queen Anne style country house that the Suckleys (cousins to the Roosevelts) built on their Hudson River estate in Rhinecliff is the main attraction at Wilderstein. Every summer for the past three years, however, sculpture has taken over the grounds, eclipsing the house's grandeur with an array of traditional and unorthodox art. The fourth Wilderstein Outdoor Sculpture Biennial, which opened in June, features 18 sculptures and installations from Hudson Valley and regional artists including Dave Channon, Michael Asbill, Carl Grieco, Alex Kveton, Jodi Carlson, Michael Ciccone, Joe Chirchirillo, David Nyzio, Peter Schlemowitz, Naomi Teppich, Tom Holmes, Jeff Johnson, Bernard Klevickas, Norm Magnusson, Shelley Parriott, Herman Roggeson, Suprina and Mimi Czajka Graminski. "Many of the works address environmental themes such as use of recycled and found objects, auto parts, a bicycle, tree logs, and historic signage, and one conceptual piece grows mushrooms," says curator Franc Palaia. Free tours with the curator are offered on August 6, September 10, and October 8 at 1pm. The exhibit closes on October 31. Wilderstein.org.