I was going to add to Jason's posting of the Cook Islands Google Portal (google.co.ck) with an unintentionally humorous URL of my own. However, I see now that the US Park Service has renamed the directory for Carlsbad Caverns National Park from the previous and much more silly "http://www.nps.gov/caca/" to just "/cave." Oh well. Think of all the potential jokes lost. :(

But wait, their "U.S. World Heritage Sites" website is still at http://www.cr.nps.gov/worldheritage/caca.htm