Complex sentence: Towards the end of the 90s the caravan park went bankrupt and shut down, the manor was just left and began to get broken in to by local youths, until one day it became victim to fire and burnt down, leaving it in ruins.
Split into simpler sentences: Towards the end of the 1990s, the caravan park went bankrupt and shut down; the manor was abandoned and suffered break-ins by local youths. Eventually it fell victim to fire and burnt down, leaving it in ruins.