Interactive Map (http://paulrademacher.com/oilspill/): This map lets you put the oil spill over the top of U.S. and World cities to compare its size. NOTE ~ it needs Google Earth to be installed to work correctly.
Waterlife (http://waterlife.nfb.ca/) is a website setup to promote a film, by the same title, co-produced by the National Film Board of Canada and Primitive Entertainment, Inc. Plus, it's a neat website to interact with.
These are free resources that connect visual images with written text.
Thinkmap Visual Thesaurus (http://www.visualthesaurus.com): This service is not free, but it should what is possible with showing the relationships between words.
Lightweight Visual Thesaurus (http://awordlike.textdriven.com):This is a free, but less powerful version of the Thinkmap site.