Considering the Hard Rock Hotel Madrid in Madrid?
A VT member wrote the following comment about visiting Madrid:
A view from the top by SirRichard
If you wanna see south Madrid from the top, you can do that from the crystal walls elevator of the Reina Sofia Museum.
If you go on a weekday or saturday morning, you will have to buy the museum ticket to enter, but is free on saturday evenings and sundays, and is a nice view from 4th floor.