Inside the ISS

Visit
Space Sailor

Use "C" to crouch, "Z" to hover and freecam (F4) then "T" if you get stuck or feel like going on an EVA.
You can also go on an EVA via the Quest Joint located on the starboard side of Node 1.

Adapted from a model by Johnson Space Center Integrated Graphics, Operations and Analysis Laboratory (IGOAL), NASA.
Source images: Blue Marble collection at NASA Visible Earth, NASA Goddard Space Flight Center and The Milky Way Panorama by ESO/S Brunier.