alien civilisation installed on earth

alien alps appalling architecture bern city civilisation civilization colonization colony conquer cosmos earth edifice edifices explore extraterrestrial fear fearsome fiction fields flight frighten frightful future giant gigantic grisly horrifying imaginary installed invade invasion lands life luzern mountain pilot planet planetarium range research river sad sadness saucer science shuttle sky skyscraper spacecraft spaceship spatial station swiss switzerland technology terrible terrific terror town transport transportation travel ufo universe urban vehicle villages water