National Register Photostream — Authorized under the National Historic Preservation Act of 1966, the U.S. National Register of Historic Places is part of a national program to coordinate and support public and private efforts to identify, evaluate, and protect our historic and archeological resources. Properties listed in the Register include districts, sites, buildings, structures, and objects that are significant in American history, architecture, archeology, engineering, and culture.
Historic Bridges of the U.S. This is the most complete database of historic bridges I've seen. The front page is blog style that seems to have an emphasis on preservation, and which links to a database that is actively being updated & expanded. You can search by state or by county, and look at each bridge's individual page, including a wealth of stats, and a high-res photo, when available. [more inside]
A website has been launched to preserve the history of Danvers State Insane Asylum. The Asylum, which opened in 1878 in Danvers, MA (site of the Salem Witch Trials) and closed in 1992, was featured in the horror movie Session 9, and may have been the inspiration for HP Lovecraft's Arkham Asylum. Its Kirkbride Wings, which once held the institution's living quarters, now house a 400+ unit apartment complex. [more inside]
Want to live for free (sort of) in a historic home? Maryland, Delaware, and Massachusetts all have resident curatorship programs, in which you can live rent-free in a historic home, provided you spend your own time and money renovating it. Contact your state's historic preservation office to see if there's a program like this near you...