United Nations
Unesco: World Heritage List
UNESCO designates natural and man-made sites of "outstanding universal value" as world heritage sites to protect them for future generations. View sites by country or use an interactive world map to locate sites from around the world...
Other
China Daily: China Culture: Ancient Chinese Architecture: Concrete Music
An overview of ancient Chinese architecture, culture, and art.
Tech4Learning
Pics4 Learning: Buildings
Pics4Learning publishes a searchable photo collection of various types of buildings from around the world.