Leave Lisbon and drive or take the train (for about 5 euros round trip ) along the coast to Cascais, considered by every guidebook of merit to be one of Portugal’s most chic resorts. “Known for its three stunning bays and boasts delicious upscale restaurants, luxurious hotels, and non-pareil beaches. But it is the tranquil atmosphere of luxury and ease, along with its stunning seaside esplanade that makes it one of …