Porto

File:Pt-pt Porto FF.ogg thumb|right|View of Porto from south side. thumb|right|View of Porto houses Porto (POHR-too, /ˈpoɾ.tu/) was named by the Romans Portus Calle (the origin of the entire present country's name), the city is nowadays officially styled A muito nobre, sempre leal e invicta cidade do Porto (the very noble, always loyal, and undefeated city of The Harbor). This is usually shortened to "a Cidade Invicta" (the undefeated city) a title won because of Porto's unparalleled resistance against hostile troops during the 1820s.

Residents of Porto are nicknamed the Tripeiros, or tripe eaters, since the Portuguese conquest of Ceuta in North Africa in 1415, when the city's inhabitants went without meat in order to provision the fleet (which left from Porto), and had to subsist on tripe soup, which developed into a gastronomical specialty of the city. The city is quite varied architecturally, with medieval and modern buildings side by side.

thumb|400px|Aerial view of Porto and Douro River * , also known as Aeroporto do Porto or Aeroporto de Pedras Rubras | url=http://www.ana.pt/en-US/Aeroportos/porto/Porto/Pages/Homepage-Porto.aspx | email= | address= | lat=41.2367 | long=-8.6708 | directions=in Pedras Rubras, about 15 km from the city centre | phone= | tollfree= | fax= | hours= | price= | wikipedia=Porto Airport | image=Aeroporto Porto 17.jpg | wikidata=Q943743 | content=Porto International Airport is the second-busiest in Portugal, posting a very high proportion of flights and passengers for a European non-capital city. }} The business is due to Porto's particular economic importance and growing tourist interest, coupled with northern passenger logistical demand to fly out of Porto directly, instead of going by rail to Lisbon to get on a flight. As a result, Porto Airport is now Portugal's secondary hub for intercontinental flights to Brazil, North America and many European destinations by the Portuguese flag carrier TAP Portugal.

Other European airlines are increasingly offering flights to Porto from their main

thumb|Porto Valley Porto, like most Portuguese cities, is a nightmare to drive in. Roads vary in conditions - from fully paved to cobbled lanes that can make even the most shortest of distance seem like a go-kart rally.

With that said, keep in mind that the tourist parts of the city (the Ribeira and Baixa) are a never ending maze of narrow streets, short tempered drivers and snakelike alleys. Better to walk (despite the fact that it's very hilly).

There may be pickpockets in heavily crowded areas and on public buses and trains; however, pickpocketing is not common in Porto. Travelling by bus or metro is generally safe and one of the best ways to go from a place to another.

Porto is generally a safe place to be if you take normal precautions like walking in well-illuminated streets at night. One part of Porto, near the Tourist Information Office between the cathedral and the steps to the small church, often has drunk people that could cause you trouble.