National Oceanic and Atmospheric Administration (NOAA) site has tons of information about Ocean where generally we cannot go or dares to go.
The site has photo gallery, video clips and education section. This section provides direct access to over 200 lesson plans, offers professional development opportunities for educators, and has an ocean career component.
I find this site quite interesting and IÃ¢â‚¬â„¢m gaining lots of knowledge about ocean.
See NOAA site for more information.