People walk on the world's longest pedestrian suspension bridge '516 Arouca', now open for local residents in the Portuguese town of Arouca, Portugal, April 29, 2021. Hugo Xavier became one of the first people to cross the world's longest pedestrian suspension bridge when it opened on Thursday near his tiny hometown of Arouca in northern Portugal. REUTERS/Violeta Santos Moura

People walk on the world's longest pedestrian suspension bridge '516 Arouca', now open for local residents in Arouca, Portugal, April 29, 2021. Hidden between rock-strewn mountains covered with lush greenery and yellow flowers inside the UNESCO-recognised Arouca Geopark, the bridge hangs 175 meters above the fast-flowing River Paiva. REUTERS/Violeta Santos Moura

People walk on the world's longest pedestrian suspension bridge '516 Arouca', now open for local residents in Arouca, Portugal, April 29, 2021. The landscape is calm, but the crossing is not for the faint-hearted. Held up by steel cables and two massive towers on each side, it wobbles a little with every step. REUTERS/Violeta Santos Moura

People walk on the world's longest pedestrian suspension bridge '516 Arouca', now open for local residents in the Portuguese town of Arouca, Portugal, April 29, 2021. The bridge opened only to local residents on Thursday, but from Monday everyone can book a visit. REUTERS/Violeta Santos Moura

People walk on the world's longest pedestrian suspension bridge '516 Arouca', now open for local residents in the Portuguese town of Arouca, Portugal, April 29, 2021. The bridge opened only to local residents on Thursday, but from Monday everyone can book a visit. REUTERS/Violeta Santos Moura

A general view of the world's longest pedestrian suspension bridge '516 Arouca', now open for local residents in Arouca, Portugal, April 29, 2021. Picture taken with a drone. REUTERS/Julio Torres