Caernarfon Castle, Wales

#summervacay Caernarfon Castle is an awe-inspiring #summervacay stop if you're traveling through North Wales. This UNESCO World Heritage Site is one of the most impressive medieval fortresses in Europe, with its massive stone walls and polygonal towers overlooking the Menai Strait. Built by Edward I in the 13th century, it’s steeped in history—most famously as the site where Prince Charles was invested as Prince of Wales. In summer, the weather is ideal for exploring the sprawling grounds and walking the castle walls. The surrounding town and harbor are also worth a visit for lunch and seaside views.