A long the sun-kissed coastlines of La Union, a string of centuries-old sentinels stands guard where the azure waves meet the shore. These Spanish-era watchtowers, or baluartes, are more than mere coral and brick; they are the stoic witnesses to a history of high-seas defiance and colonial grit. 

From the weathered lean of the iconic tower in Luna to the revitalized military nerve center of San Juan and the newly minted National Cultural Treasure in Balaoan, these structures formed a vital defensive chain against invading pirates. Today, these remaining guardians endure as monumental fusions of coastal splendor and architectural resilience, whispering tales of a region that has always known how to keep watch over its own soul.

Almeida watchtower

Established in 18th and 19th centuries (the 1700s and 1800s) in Barangay Almeida, municipality of Balaoan, La Union.

The Watchtower at Barangay Almeida, Balaoan, La Union has been declared a National Cultural Treasure in 2014 by the National Museum of the Philippines. 

The Almeida Watchtower in Balaoan is connected in the towers of the neighboring town of Luna, Bacnotan and San Juan. Located in Balaoan, La Union, Philippines, it is a 400-year-old Spanish-era structure designated as a National Cultural Treasure. 

Built using coral stone and bricks, it functioned as a vital coastal lookout to protect local communities from pirate raids. The tower was built to warn of impending attacks by pirates (Moro, Chinese and Japanese) during the 18th and 19th centuries.

Baluarte Watchtower (Luna Watchtower) 

Established in 1600s in Barangay Victoria, Municipality of Luna, La Union.

The weathered sentinel from the pebbled shores of Luna is the Baluarte Watchtower, a monumental fusion of Spanish colonial grit and coastal elegance. 

This 19th-century fortress, crafted from coral stone and lime, once served as the region’s military eye in scanning the horizon for Moro pirates who threatened the Ilocos coastline. 

Today, its iconic lean — the result of centuries of typhoons and shifting sands — gives it a sculptural, avant-garde silhouette that channels the drama of its treasured past.