wooden footbridge crossing dry grass field towards porto skyline in vila nova de gaia estuario do douro local nature reserve,

architecture destination perspective environment footbridge showcasing stretching horizontal landscape boardwalk cityscape buildings peninsula ecosystem crossing estuario portugal outdoors tranquil peaceful distance inviting skyline reserve leading esturio walkway horizon tourism iberian habitat natural wooden nature scenic modern summer travel europe golden grass field porto douro local clear river urban sunny vila nova gaia blue path wood hour warm