Hello Merkat
I think it will be very hard if your aim is to invest and build a port folio in order at some stage to buy a house in the UK with £50K.
I would forget about the places that the masses have gone to because in the end the competition will force down the prices in all of these places and rental may be difficult to get epically in sunshine destnations.

Be very careful about who you buy through as some people that have bought in excellent areas like growing cities still haven't made a gain 2 years on as they didn't due enough homework and shop around and payed 20% or 30% above market value. Most of these people would have gone on an inspection trip.

I think land may be your best option but the euro isn't in your favor at the moment.
You could possibly invest in Tirane (off plan) but i have yet to see a development that ticks my boxes and i have looked very hard.
To be honest in the present climate i would wait because prices in The UK and Ireland are coming down in many places and in a year or two they may fall enough for you to get on the ladder. Deposits and down payments in the UK i thought were pretty low and mortgages aren't that hard to get.

I have recently gone into an investment in shares of land and i think it may be by far the best option. ie: Getting into a syndicate Company that buys land , gets all the planning permission and sells it to a developer. You don't have any furniture costs, maintenance costs, insurance costs and rental worries. It carries just as much risk as buying off plan but usually the land is very cheap at the start anyway and it can only go up with getting the different levels of planning permission.
It think Brazil might be a good option, you may be able to get a nice site or apartment somewhere but Brazil will take longer some time to mature as it has such a vast coast line.

I was in your position only a few years ago and i invested all i had which was about 17k with a friend in a studio in an emerging market and it went well and started the ball rolling but i was lucky.

Strangely enough the longer you wait before buying sometimes the better the investment opportunities seem to get !
My advise is work, save get a place in to live in first then purchase abroad because if you lose this £50k and it happens every day to investors it may set you back a few years. If you have to invest, team up with a close friend and invest £80k(40k each or less ) as this will greatly improve scope and you will have some back up.
Investing is the best thing in the world until you loose money
When i was 22 i wouldn't have listened to my own advise either but do yourself a favor and stay away from Property companies that have huge budgets and appear on tv a lot