There is certainly no water on the surface of this planet.
You are motioned through the reception area...
... and you find yourself in a huge, impossible, underground city. Containing everything you are used to in cities- hovercards, walkways, huge buildings- but all in the most enormous cavern. You have never seen anything like it. Not that it would be impossible, but no species has ever had the need to do something like this. So much effort! And so well done!
Your captor meets another like him as he leads you on, and the two of them jabber away. They seem to be having an argument. The other one storms away, obviously angry, soon after, and your captor leads you on.
You are taken to a large, impressive, palace like building in the middle of the city via a large hover transport. There, you are led through corridors, until finally you are herded into a hi-tech security cell. where for a few moments your captor leaves you, except for the guards.
The field on this cell that seperates you from the outside is lethal to the touch; don't think about it.