Today's deal gets you half off membership to the National Trust for Historic Preservation. Choose between two options:

• For $15, you get a family yearlong membership (a $30 value).
• For $10, you get an individual yearlong membership (a $20 value).

The National Trust for Historic Preservation is a nonprofit organization dedicated to protecting and preserving America's historic places. Membership helps support the organization’s mission and includes discounts at historic sites, including the Cooper-Molera Adobe, Filoli, and many others.

Members can also take discounted visits to partnering parks, museums, and conservatories across the nation, as well as international travel sites. In addition, members receive special rates at affiliated Historic Hotels of America, a collection of more than 200 historic hotels throughout the country, and a one-year subscription to Preservation magazine.