The Pyrestone House Left Vacant After Plateau Vent Cooling Decline

Pyrestone House was completed in 1908 within a vast basalt plateau forest where thin trees grew between fractured volcanic slabs and shallow geothermal vents. Designed by the Harkwyn family as both residence and geological monitoring structure, the house was conceived as a compact but highly angular Victorian residence composed of interlocking geometric volumes. Rather than following symmetry or traditional rooflines, the structure was shaped as a cluster of rotated architectural forms embedded directly into the volcanic terrain.

The exterior was constructed from rough-hewn basalt blocks combined with sharply cut limestone inserts and sections of weathered metallic cladding. Basalt dominated the lower structure in deep charcoal, matte black, and smoky graphite tones, emphasizing mass and absorption of light. Limestone appeared in pale bone white, cool ash gray, and faint mineral pink, providing stark structural contrast. Metallic panels—once polished—retained traces of brushed bronze, oxidized copper, and dull steel blue, now softened into irregular reflective accents across the façade.

The building’s form was defined by stacked and offset volumes that jutted outward at irregular angles. Each section appeared slightly rotated before placement, creating deep recesses, cantilevered corners, and sheltered alcoves. This fractured geometry broke the silhouette into a complex interplay of planes, emphasizing tectonic construction rather than ornamental design.

Inside, the Harkwyn family maintained a combined domestic and geothermal research life. Dr. Elias Harkwyn studied subsurface heat flow and basalt fracture patterns, while his daughter Mirelle documented ecological adaptation within the vent forest. The house functioned as both living space and scientific observatory, with circulation routes following angular transitions between volumes rather than linear corridors.

Early financial strain

By the late 1920s, geothermal survey funding shifted toward centralized geological institutions, reducing the need for private plateau monitoring residences. As research contracts were withdrawn, the Harkwyn family’s role diminished. Maintenance became increasingly difficult as steam vents intermittently affected lower structural recesses, accelerating mineral staining and thermal stress on stone and metal surfaces. Copper panels began to develop uneven verdigris patterns, while limestone inserts showed faint thermal discoloration.

Gradual decline in the household

As financial strain increased, less stable lower volumes near geothermal vents were gradually abandoned due to heat fluctuations and structural unpredictability. Interior occupation shifted toward upper and more thermally stable sections of the house. Steam infiltration became more frequent, softening visibility within lower recesses and accelerating decay of wooden and metallic components.

Family members eventually relocated to academic institutions specializing in volcanology and structural geology. By the early 1940s, only intermittent occupancy remained, primarily for data retrieval and structural inspection.

Final abandonment phase

By 1946, Pyrestone House was no longer fully inhabited. Utility services were discontinued as access across the plateau became increasingly hazardous and maintenance costs escalated. Without intervention, geothermal vents continued to alter the microenvironment around the structure, introducing intermittent steam flows into abandoned spaces. Metallic cladding oxidized further, and basalt fractures widened under thermal cycling.

The house left empty

By the late 1940s, no formal ownership or maintenance of Pyrestone House remained. Legal responsibility dissolved among distant heirs who never returned to the volcanic plateau. No restoration was undertaken, and no institutional transfer occurred. The house remained embedded within the fractured basalt landscape, slowly deteriorating as geothermal activity, mineral deposition, and time reduced its sharp geometry into a softened tectonic ruin.