The attitude of the ISS varies, depending on mission requirements. Most of the time, the ISS flies a biased LVLH (Local Vertical Local Horizontal) attitude. read more
Mostly but not necessarily. The cupola is placed on the nadir side of ISS. The default flight attitude puts the ISS more or less in LVLH (Local Vertical Local Horizontal) which places the cupola towards the Earth. read more
I recently got into a twitter discussion over the ISS attitude. The point of the discussion is the attitude that the ISS mantains while orbiting around the Earth. read more