- MIMOA | Modern Architecture Guide
- Page http://www.mimoa.eu/
- Shows Modern Architecture on a map with the address and additional information to find and visit interiors, parks, public places, buildings and bridges.
- The World of Castles
- Page http://www.castlesworld.com/
- Extensive collection of castles, fortresses, manor houses and other historic buildings with key information about each site and a flexible search function. Visitors can rate each castle, submit a comment or review, add or suggest a castle, upload pictures and much more.