scenic hiking trails in the parque natural da serra da estrela, portugal

mountain horizon cloud hill sky sea morning coast mist dawn ridge nature ocean lake landscape summit terrain plateau snow scenic hiking trails parque natural serra estrela portugal adventure attraction background beautiful blue calm clouds countryside destination environment europe explore fog hike hiking hill journey landmark landscape mountain nature outdoor panoramic park peaceful picturesque portugal reserve rural scenery scenic serenity estrela sky skyline star mountains stunning summer tramping travel vacation view wanderlust water wilderness wind turbine windmills mountains