to restore it. >> ernest hemmingway lived there through the 60s.e wrote for whom the bells toll. >> reporter: the look out farm is one of america's most endangered places. the first site to be picked outside of the u.s. >> he left 10,000 library books, 3,000 photographs. scripts, he had markings on the walls in some. it really was two decades when he was at his happiest and most productive. >> reporter: the national trust is seeking permission from the u.s. government to restore the home. one cuban american politician says the property ties to fidel castro make the restoration project unacceptable. >> it's unbelievable that a u.s. organization would bypass u.s. buildings to restore and then go to fidel castro's cuba one of the world's richest tyrants and help him refurbish a tourist site where tourist dollars go to feed his dictatorship. >> reporter: teams have already been allowed to survey the home. the restoration would be a joint effort between americans and the cuban government and would require the bush administration to ease the trade embarg