Sintra is famously known by the evocative nickname "Glorious Eden," a moniker bestowed upon it by the legendary British poet Lord Byron in the 19th century. After visiting the town in 1809, Byron was so captivated by its mystical beauty that he described it in a letter as "perhaps in every respect the most delightful in Europe" and later immortalized the "Glorious Eden" description in his epic poem Childe Harold's Pilgrimage. The nickname perfectly captures Sintra's ethereal atmosphere, characterized by lush, misty forests, exotic gardens, and a concentrated collection of Romanticist palaces that look like they were plucked from a fairy tale. Beyond Byron's tribute, the town is also frequently called the "Land of Moon" (Cynthia), a name rooted in its ancient Roman association with the goddess Diana. In 2026, these nicknames remain central to Sintra's branding as a UNESCO World Heritage site, highlighting the unique microclimate and architectural opulence—most notably the colorful Pena Palace and the mysterious Quinta da Regaleira—that make it feel like a secluded paradise hidden away from the nearby bustle of Lisbon.