Despite the economic turmoil, civic improvements continued. In the mid-1970s, Arthur P. Ziegler, Jr. and the Pittsburgh History and Landmarks Foundation (Landmarks) wanted to demonstrate that historic preservation could be used to drive economic development without the use of eminent domain or public subsidies. Landmarks acquired the former terminal buildings and yards of the Pittsburgh and Lake Erie Railroad, a long property at the base of Mt. Washington facing the City of Pittsburgh. In 1976, Landmarks developed the site as a mixed-use historic adaptive reuse development that gave the foundation the opportunity to put its urban planning principles into practice. Aided by an initial generous gift from the Allegheny Foundation in 1976, Landmarks adapted five historic Pittsburgh and Lake Erie Railroad buildings for new uses and added a hotel, a dock for the Gateway Clipper fleet, and parking areas. Now shops, offices, restaurants, and entertainment anchor the historic riverfront site on the south shore of the Monongahela River, opposite the Golden Triangle (Pittsburgh). Station Square is Pittsburgh's premier attraction, generating over 3,500,000 visitors a year. It reflects a $100 million investment from all sources, with the lowest public cost and highest taxpayer return of any major renewal project in the Pittsburgh region since the 1950s. In 1994, Pittsburgh History and Landmarks Foundation sold Station Square in to Forest City Enterprises which created an endowment to help support its restoration efforts and educational programs. Each year the staff and docents of Pittsburgh History and Landmarks Foundation introduce more than 10,000 people – teachers, students, adults, and visitors – to the architectural heritage of the Pittsburgh region and to the value of historic preservation.