Halcyon Castle, also known as Kovalam Palace, is a historic seaside landmark in Kovalam, Kerala, built in 1932 by the Travancore royal family and admired today for its beautiful colonial-style architecture, lush gardens, and panoramic views of the Arabian Sea. Once a royal summer retreat, the palace now forms part of a luxury heritage hotel, allowing visitors to admire its exterior charm and royal ambience even if the interiors are not always open for public tours. The general visiting hours are 10:00 AM to 5:00 PM, though access may vary depending on hotel operations, and there is no fixed entry fee unless specific guided tours are arranged. Located close to Kovalam's famous beaches, Halcyon Castle is a must-visit for travelers interested in heritage, architecture, and peaceful coastal views.