Bath Preservation Trust: Aims to preserve the unique architectural heritage of a World Heritage City. Maps and directions, news, museums run by the Trust.

Preservation Easement Trust: A nonprofit organization dedicated to preserving historic buildings and sites through the acceptance and responsible management of historic preservation conservation easements.

Sable Island Preservation Trust: Features information about the island, organization background, volunteer opportunities, newsletters, and membership information. Nova Scotia.

The Industrial Buildings Preservation Trust: IBPT takes on buildings of historical significance that have no future in the ordinary market place. Aims, board.

Connecticut Trust for Historic Preservation: Dedicated to preserving the state's historic architecture, streetscapes, urban neighborhoods and country landscapes. Photographs and details of endangered historic properties. News, events.

Florida Trust For Historic Preservation: Aims to promote and preserve architectural, historical, and archaeological heritage. Conferences, workshops, publications and tours of preserved historical sites.

National Trust for Historic Preservation: Preservation information, features, events and activism for America's historic places.

Whittington Castle Preservation Trust: Campaign by villagers to preserve this ruined Norman Marcher castle. Brief history. Interactive aerial photograph brings up description of features. Gallery of expandable thumbnails.

All Saints Leighton Buzzard Preservation Trust: News on the progress of the restoration of the 13th- century parish church, and the appeal supporting it. Photographs, brief history.

Institution of Environmental Sciences: Professional body for environmental scientists in the UK to provide balanced, scientific information on the environment to members and the public. Includes organization information, journal archive, and links.