According to an article by Blikk and Origo Keanu has arrived in Hungary. The Entertainment System Is Down will be filming as the Astro Filmland Studio in Mogyoród, Hungary.
According to the articles, Keanu is not staying in a hotel. SOunds like he is staying in a rental in the city center so he can walk around. According to an informant, he wants to visit museums and galleries and is enthused that the Hungarian MotoGP racetrack is nearby.