We visit the home of the vultures and the eagles

Eagles, vultures, and hawks build their nests in niches of the rock faces.

The bridge spans an old rail line, now a bike path.

It takes only about a half hour to get to the town of Irurtzun and the hiking trail known as "the vultures' overlook" el balcón de los buitres.

The trail itself is only about three miles in a loop, but it rises about 900 feet (a map of the trail is here).

The first third of the trail is quite steep and challenging before rising above the town and valley.

The Sunday we were there we heard the pipes and drums of a traditional Basque band playing 
below us in the town.