If you are looking for full on topo maps, try
http://libremap.org/
I also coded my own map to place the locations of photos on my website., similar to what DTape posted. Here is an empty map without markers with terrain, satellite, street, and topo map (the topo map tiles load slowly, the terrain feature is fast and very cool):
http://www.naturefocused.com/maps/map.php
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Greg
www.naturefocused.com