Murillo P.
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The Sanctuary of the Sacred Heart of Jesus (Mount of Santa Luzia) in Viana do Castelo offers breathtaking views! If you can, climb to the top of the church — the path is narrow, but the panoramic views of the city and sea are absolutely worth it. Tickets are available from a vending machine on-site.
The church itself is stunning, both inside and out. You can reach it by taxi or Uber, on foot (a steep hike), or by cable car. I went up by taxi and down by cable car, which was a lovely experience.
Overall, this is a must-visit spot in Viana do Castelo — one of the most beautiful viewpoints in Portugal!