summer holidays

i used to go on 2 holidays each summer: one to russia with my mum for like 2 or 3 weeks then a whole family holiday to somewhere sunny for a week and sometimes i also went on an activity week to the isle of wight but this year my sisters going interrailing for the holidays so me and my mum are going on a one week holiday with my aunt and cousin so that leaves with 5 weeks of nothing so i just need some ideas of what to do in the summer like festivals and stuff like that oh and i'm 15