Ponte Vasco da Gama, Portugal
Officially the longest bridge in Portugal, the Ponte Vasco da Gama Bridge is a whopping 17km long (which is more than 10 miles, in case you work better in miles). Situated just east of the capital city Lisbon, this bridge crosses the Tagus Estuary, a wide, but thankfully shallow, expanse of water.
No longer the proud bearer of the Longest Bridge in Europe moniker (that now belongs to the Øresund Bridge that connects Denmark and Sweden and stands at over 10 miles long), it’s a road bridge that’s a feat of engineering. Built to ease traffic, it’s not just an ultra long bridge, it’s built over water that tells a story deep below its surface. An area of known seismic activity, the danger of this bridge is its potential for an earthquake at any time. And the fact that the very nature of the water bed makes the foundations fairly unstable.
However, it has been built to withstand an earthquake, and its viaducts that extend 95 metres down into the rock below should be enough to satisfy even the most nervous of road users. Fun fact – the Ponte Vasco da Gama bridge is so long, that it needed to be built with the curvature of the earth in mind. Wow!