Children up to 5 years old and Seniors > 80 years old have free admission, but requires a ticket. Once inside Quinta da Regaleira the visitor rules must be respected. Keep your ticket until the end of your visit.

Yes, you can go inside the main buildings of Quinta da Regaleira in Sintra, but access is limited compared to the vast gardens. Visitors are permitted to enter the Palace of Regaleira, specifically the ground floor and the first floor, which include the Hunting Room (Dining Room), the Renaissance Room, and the Kings' Room. The upper floors remain closed to the public as they are used for administrative and conservation purposes. Additionally, you can enter the Regaleira Chapel, a stunning Romanesque structure with rich interior symbolism. While the interiors are architecturally beautiful, most of the "magic" of the Quinta is found underground; you can go inside the Initiation Well, descending its 88-foot spiral staircase, and traverse the labyrinthine tunnels that connect different parts of the estate. In 2026, it is highly recommended to book timed-entry tickets online in advance, as capacity for the palace interior is strictly monitored to preserve the delicate wood and stone carvings.