The Thoreau Center for Sustainability, operated by
Tides, is a model "green" center for non-profits and the first organization
to locate to the Presidio after the site became part of the national park system. The Thoreau Center, which opened its doors in 1995, rehabilitated the
historic former Letterman Hospital complex using
environmentally-sustainable techniques.
Today, the Center's 12 buildings house 60 organizations working for social justice, community education and development, public health, and environmental stewardship.
Visitors are invited to enter the Thoreau Center lobby to enjoy a collection of historic photos on display and to experience the campus’s bright and open feeling. The
Thoreau Gallery regularly hosts exhibits and programs for the public. Acre Café is open for visitors Monday to Friday.