Huelva to Portugal itinerary
50 km - 1/2 hour
Leave Huelva City centre to the west on the A-497 and cross the bridge over the River Odiel. After 6km turn right at Corrales on the A-492 to eventually join the A-49 motorway, or the N-431 highway.
Signage from Huelva city will take you a less interesting route north on the H-30 to join the Motorway. It is less direct but probably quicker.
If you have time don't turn off at Corrales and take the coast road. The beaches ere are some of the best examples of expansive golden sands backed by sand dunes. Punta Umbria is a well kept coastal resort at the mouth of the River Odiel. El Rompido further west overlooks an interesting sand spit.
Lepe is the first town you meet. It does have a few interesting features but is normally by passed by tourists.
Ayamonte is the Spanish border town. The car ferry to Portugal, which served travellers for many years before the bridge, still runs from here. If you have the time use it to cross the River Guadiana to San Antonio in Portugal.
The N431 joins the A-49 motorway continues west and you will cross over the River Guadiana on the modern suspension bridge without any formalities you will cross to Portugal.