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What is your nationality.? Whether or not you need a visa to certain countries depends on your nationality. If you need a visa to a certain country, you need to apply through the embassy or consulate of that country closest to you. If you had told us your nationality, I could have given you a list of countries and whether or not you need a visa to visit them...so, you can add that info now. You can also check out the sites below for free or work in exchange for lodging.

You will need your passport.Visas are required by some countries and not others (depending also on the length of stay etc). Different countries also offer exchange - or - work programs for 18 to 30 years old: check with the various embassies, addresses on the web).. also of interest: couchsurfing.com hostelworld.com and housesitting.com.