Here's more than five, in case you have already seen some before:
AnyBirthday
http//www.anybirthday.com
A unique site - it has a database containing the birthdays of most
adult Americans. Their paid service is awesome for adoptees - enter a
first name and birth date, and it returns where they live.
Terraserver
http://terraserver.microsoft.com/High resolution satellite photos of the USA, for free. Get an aerial
view of where you live.
Half Bakery
http://www.halfbakery.com/"The Halfbakery is a communal database of original, fictitious
inventions, edited by its users. It was created by people who like to
speculate, both as a form of satire and as a form of creative
expression."
Anomalies Unlimited
http://www.anomalies-unlimited.com/A fun site covering a lot of conspiracy theories, and wacky stuff like
Michael Jacksons face, rude images in Disney cartoons and the Shroud
of Turin.
Gas Price Watch
http://www.gaspricewatch.com/"We monitor gas prices across the country so you can get the best deal
in your area. Search our database to find the lowest gas prices in
your area."
The Onion
http://www.theonion.comFunny newspaper.
Landover Baptist
http://www.landoverbaptist.org/The Onion of religious sites.
Singing Fish
http://www.singingfish.comNot many people have heard of it yet, but this is easily the best way
to find streaming media.
The End of the Internet
http://www.shibumi.org/eoti.htmExactly as it says.
Family Search
http://www.familysearch.orgThe Mormons have put their genealogical database online for anyone to
use.
Obsolete Computer Museum
http://www.obsoletecomputermuseum.orgAnyone who likes telling friends how their first computer only had 1K
of RAM will dig this archive of memorabilia.
Search strategy: personal bookmarks