Martello Tower at La Preneuse

Following the British takeover of Mauritius in 1810, the British military sought to strengthen the island's coastal defenses against potential French naval retaliation. Between 1831 and 1834, the Royal Engineers constructed five round, stone fortification towers known as Martello towers along strategic coastal bays—three at Black River, one at Port Louis, and one at Grand River Northwest. The tower at La Preneuse was named after the 1799 naval engagement nearby between the French frigate 'La Preneuse' and British warships.

The tower was constructed with exceptionally thick walls—up to 3 metres thick on the seaward side—made from cut basalt blocks and lime mortar, designed to withstand heavy naval artillery fire. A small detachment of British artillerymen and soldiers lived inside the tower, which featured a ground-floor gunpowder magazine, a middle-level living quarter accessed by a removable ladder, and an upper roof deck mounting a heavy 24-pounder cannon on a 360-degree traverse platform.

By the late 19th century, advancements in rifled artillery rendered Martello towers obsolete, and the fort was abandoned by the military. For decades, the structure stood dormant on the beach, exposed to sea spray and weather. In 1992, the non-governmental organization 'Friends of the Environment' launched a restoration project, converting the tower into a historical museum displaying original weapons, uniforms, and living quarters.

Local legends surrounding the Martello Tower at La Preneuse focus on the harsh, isolated life endured by the British artillerymen garrisoned inside during the mid-19th century and the tragic deaths recorded during coastal storm duty.

According to local oral history, a young British artillery gunner assigned to night watch duty on the upper roof deck fell ill with a sudden tropical fever during a ferocious Indian Ocean cyclone in 1842. Despite his high fever and delirium, he refused to abandon his post and reportedly collapsed beside the heavy iron cannon mechanism. Legend maintains that his vigilant spirit never left the roof deck, forever bound to guard the bay against French invaders.

Another widely shared story concerns the tower's subterranean copper-lined powder magazine. Local residents tell of a mysterious 'Sentry in Blue'—a spectral soldier clad in an 1830s British Royal Artillery uniform who stands guard at the foot of the interior spiral stairs. Beachgoers walking along La Preneuse beach at night report seeing his luminous silhouette looking out through the high gun embrasures toward the dark ocean water.

Additionally, local oral history recounted by island elders emphasizes that the spiritual resonance of the site is passed down through traditional Creole storytelling. Villagers frequently advise visitors to approach the grounds with respect, noting that those who mock local traditions often report feeling an overwhelming sense of dread, disorientation on the pathways, or noticing eerie flickering shadows that seem to follow their every step along the historic grounds.

Museum volunteers, night watchmen, and beachgoers near La Preneuse have documented persistent ghostly activity around the Martello Tower. The most frequently reported phenomenon is the sound of heavy, iron-shod boots slowly descending the narrow interior stone staircase late at night when the museum is locked and empty.

Inside the lower powder magazine, visitors and staff frequently report sudden, shivering drops in temperature, accompanied by the distinct, acrid smell of old gunpowder and damp hemp rope. Several night guards have claimed that the heavy 24-pounder swivel cannon on the roof deck—which requires significant physical effort to pivot—has been found pointing in a different direction in the morning despite no human presence on the roof. Tourists taking photos from the beach at dusk occasionally capture a tall human figure standing beside the roof cannon against the sunset sky. Paranormal investigators and sensitive visitors have also noted sudden electromagnetic field spikes and unexplained battery drains on digital cameras during twilight hours.

The Martello Tower at La Preneuse is a robust, truncated conical stone tower standing approximately 10 metres high and 12 metres in diameter. Its walls are constructed from thick basalt stone masonry, measuring nearly 3 metres thick facing the sea and 2 metres thick facing landward to absorb cannon impacts.

The interior is divided into three levels: a ground floor containing a stone-vaulted gunpowder magazine and a rainwater cistern; a middle residential floor with sleeping quarters, cooking hearth, and defensive loopholes; and an open roof deck protected by a stone parapet. The roof features a fully restored 24-pounder brass cannon mounted on a revolving timber carriage, capable of rotating 360 degrees to cover the bay.

The Martello Tower Museum is situated directly on La Preneuse Public Beach in Black River, western Mauritius. The museum is open Tuesday to Saturday from 09:30 to 17:00, and Sundays from 09:30 to 13:00 (closed Mondays). Entrance requires a small admission fee, which supports ongoing monument preservation.

Guided tours are led by knowledgeable local docents who demonstrate the revolving cannon mechanism and explain 19th-century garrison life. Accessing the middle and roof levels requires climbing narrow, steep wooden and stone stairs, which may be challenging for visitors with mobility impairments. Ample parking, public beach facilities, and food stalls are located nearby.

The tower's haunting reputation is fostered by its thick, claustrophobic stone architecture, isolated beach location, and 19th-century military history. The combination of sealed gunpowder vaults, a solitary roof sentinel legend, and documented physical phenomena like moving cannon mounts gives this coastal fort an enduring spot in Mauritian ghost lore. This unique combination of deep historical memory, tragic loss, and preserved architectural beauty ensures that the site remains an enduring centerpiece of Mauritian paranormal lore and dark tourism.