hiking views in the parque natural da serra da estrela, portugal

horizon sky mountain cloud hill morning dawn haze sea sunlight plain mist dusk fog plateau landscape nature coast sunrise expansive hiking views 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