Un hôtel sous-marin or Un hôtel sous l'eau.
sous-marin is an adjective
sous l'eau is an adverb
un sous-marin as a noun is a submarine boat
O would say the best underwater hotel is Jules Undersea Lodge;)
An hotel room is called 'une chambre d'hôtel' in French.
C'est un hôtel
This is how you say it... boutique hôtel écologique.
Janitor (cleaning) Concierge (Hotel)
juke l'hôtel commun.
où est l'hôtel ? -
The designer of the Hydropolis underwater hotel was a man by the name of Roland Dieterle who was or is a professor. It would have been the world's first underwater hotel but the construction of it was delayed and no work has been done on it since 2010.
Un bed and breakfast (these are borrowed words)
Ecole de gestion hotelière.
the Hen Hotel would be called "l'hotel de la poule" in French. If this is only about hens, a hen house or hen coop is "un poulailler" (masc.).
An hotel is spelled "un hôtel" in French.