Here you will find some useful links to other sites about the seven wonders:

http://ce.eng.usf.edu/pharos/wonders - A very good page about the seven wonders. It gives a brief review on all of them.

http://www.unmuseum.org/wonders.htm - Another place where to look information about the seven wonders.

http://www.mmmpcc.org/jerrywalkosz/wonders.htm - Very little information here. The pictures are nice though.

http://www.sd83.bc.ca/stu/9711/jlk2m.htm - A brief overview of the seven wonders

http://eroosevelths.pgcps.pg.k12.md.us/~templin/7wonders/ - Another short overview

http://www.worldskip.com/7wonders/lighthouse.html - A very good place. Gives information about all the seven wonders