Port Wine Cellars
Hence, the most popular tourist attraction in Gaia is the Port Wine Cellars, warehouses where the famous Port wine is stored. The Cellars are placed in Ribeira de Gaia, an area of the city located on the bank of River Douro opposite Porto.
While technically
its own city, Vila Nova de Gaia is situated just across the Douro from Porto
and is woven into the city’s fabric both by a series of bridges as well as its
shared history of port-wine making.

There are several categories of ports, that can usually be broken down further by their aging and quality. , you’ll most commonly find a Ruby Port, a Tawny Port, and a White Port.
Ribeira de Gaia has also some excellent
restaurants, particularly in Cais de Gaia.
Even if you are not visiting the cellars, you should visit Ribeira the Gaia to get some
amazing views of Porto.