Portugal's Porto region is considered by some to be one of Europe's most undervalued investment hotspot, which data backs up. For example, rent yields in Lisbon tend to be among the highest on average in the country (over 6 per cent) while demand for re-sale properties across the Algarve remains about as reliably high as it gets. Even during the economic downturn, though, Porto weathered the storm considerably better than most. With prices now climbing once again, the market has become both an attractive place for lifestyle and buy-to-sell investors and a reliable source of rent yields and easy year-round lettings.