I had the same regret as you; not travel more. Im still in my mid-20's but I deeply regret not going out to travel more during my university period. All I did was playing online games and hang out with roommates. Im not saying its a bad thing to spend time with games and friends, but i wished i had used my time better. Well its no use to cry over spilt milk, i am now looking forward to my travel plan throughout this year and next year. Cheers!