The site, near Hudson, N.Y., is historic and spectacular, and the birding is excellent. I birded Olana with William Cook, Kathryn Schneider, Marian Sole and another excellent birder from the Alan Devoe Birding Club of Columbia County, N.Y.
The column, with a link to a video about Olana, is here.
A terrific song about Olana, by Marc Cohn, is here.
The town of Hudson is worth a visit as well -- great restaurants and shops.