wooden footbridge leading to porto skyline in estuario do douro local nature reserve, vila nova de gaia, portugal

destination perspective exploration picturesque footbridge stretching marshland cityscape landscape adventure boardwalk beautiful estuario portugal offering tranquil outdoors contrast peaceful relaxing leading skyline reserve walkway esturio scenery tourism journey horizon daytime morning idyllic natural wooden nature escape travel summer autumn scenic serene porto douro local clear urban rural water sunny quiet vila nova gaia blue path wood