Cascais is the “Portuguese Riviera.” A former fishing village, it became a cosmopolitan resort when the Portuguese king made it his summer retreat in the late 1800s. The nobility soon followed him, and, as a result, elegant 19th-century mansions now line the cobbled pedestrian streets of the historic center and the seafront. During World War II, when Portugal remained neutral, European monarchs seeked exile on the Lisbon coast, settling in Cascais and neighboring Estoril, further making the area rich and glamorous. Today, it’s a place for everyone, with the people of Lisbon and surroundings heading in its direction whenever they want some beach lounging, a dip in the cooling Atlantic waters, a rich seafood meal, or simply a stroll by the sea. They’re joined by the many tourists who visit Lisbon, who also take some time to enjoy a sunny day on its beautiful coast. While it’s most often a…