recent pattern in dreams

hi,
ive been having dreams where i know ive been there before...i go back to the same place and do different things...ive never had this before - what does it mean?
there are three places so far - one is inside a dark house where i am in a large dining room, and a dark long hallways runs alongside it. i saw a negative entity here just once, who scared me so much i actually woke up.
the second is a large open air train station made of many stairs and wide balconies with little festival stalls. i have been there twice, each time with different friends.
the third is the second-top floor of a hotel, an apartment, but one which has a hole in the centre of the floor and ceiling so that the staircase runs through all the floors and everyone can see in. the floor above is a giant metal kitchen where foor is prepared en masse, and raincoats hang. many friends from throughout my life came into this apartment where i sat in the lounge.

stairs/interiors seem to keep coming up often, even in other dreams i have.
should i be paying attention to this at all??
thank you