Open: Year Round ... Radisson Blu Park Hotel Athens first opened its doors in 1976 on the border of the central park of Athens, Pedion Areos (Martian Field), in a safe part of the city. For 35 years the lovely park has been a wonderful host and marked the very identity of this leading deluxe hotel. Now, we thought, it is time for the hotel to host the park inside.  This was the inspiration behind our recent renovation, which came to prove a virtual rebirth for Park Hotel Athens.