Cascais is known as the "Portuguese Riviera" and is a must-visit in 2026 for its blend of regal history and Atlantic coastal charm. Once a humble fishing village, it became the summer retreat of the Portuguese monarchy in the 19th century, leaving behind a legacy of grand villas and palaces like the Condes de Castro Guimarães. Today, it offers stunning sandy beaches like Praia da Rainha, world-class surfing at Guincho Beach, and a vibrant marina. It is only a 40-minute scenic train ride from Lisbon, making it the perfect base for exploring the capital while enjoying a more relaxed, upscale atmosphere. Foodies will love the fresh Atlantic seafood, while nature lovers can explore the rugged Boca do Inferno (Hell's Mouth) cliffs or hike the nearby Sintra-Cascais Natural Park. Its "walkable" historic center, filled with cobbled streets and lively cafes, makes it one of the most charming seaside towns in Europe.