What is a good website to look into getting involved in a scheduled group trip?

I am interested in travelling to Australia sometime next year. I would be interested in going with a group of other travellers for a certain, set period of time and doing activities with them so I won’t be visiting the country alone. I am trying to find a website that offers these sort of tours/holiday packages, specifically for someone a bit younger (I’m 19 and I would enjoy spending my time with other people within at least 10 years of my age). I would really appreciate some suggestions so I can start to look into this

There are lot of available for you in the internet. You can surf in the internet and ask suggestion to any of your friends who have visited Australia previously too. I can give some suggestions. There are lot of things to do in Australia, especially in sydney like cruising,sydney harbour bridge climb, opera house tour, sydney aquarium, Luna park, sightseeing cruise, etc .

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