Subterranean Ruins by A Threshold: A Sustainable Retreat Blending with Nature

A Harmonious Fusion of Architecture and Landscape in Kaggalipura, India

Nestled in the lush farmland of Kaggalipura, a small town 40 kilometers south of Bengaluru, Subterranean Ruins by A Threshold is a visionary architectural intervention that seamlessly integrates built forms with the natural landscape. Designed as a multifunctional retreat, the project reimagines ruins as living spaces, using locally sourced materials and traditional construction techniques. The result is a structure that is both sustainable and deeply rooted in its surroundings.

Site and Landscape Integration

The 3-acre site is a thriving fruit orchard featuring mango, sapota, banana, coconut, butter fruit, and jackfruit trees. The topography, characterized by a gentle slope with a steep four-meter drop, provided an opportunity to embed the structure within the land with minimal excavation. This approach not only preserves the natural terrain but also enhances passive cooling by reducing direct solar exposure on the southern façade while maximizing natural light on the northern side.

Additionally, a rainwater harvesting system has been incorporated to support the existing farming practices, ensuring long-term sustainability. The rooftops, covered with soil and vegetation, further enhance thermal insulation and offer opportunities for small-scale farming, reinforcing the project's ecological ethos.

Design Concept: Modern Ruins in Harmony with Nature

Inspired by the concept of subterranean caves and ancient ruins, the architecture embraces an unfinished aesthetic that allows the structure to blend seamlessly with the landscape. Designed around existing trees, the spaces evolve organically over time, becoming a part of nature rather than imposing upon it.

The layout consists of a network of enclosed and open spaces, allowing for flexibility in use. The primary built elements are sunken into the earth, forming shaded courtyards, passageways, and multifunctional enclosures. This built-unbuilt synergy fosters a dynamic environment where activities can spill over between indoor and outdoor spaces.

Locally Sourced Materials and Sustainable Construction

Sustainability is at the core of the project. All materials are locally sourced to reduce the carbon footprint and support the regional economy. Large boulders excavated from the site were repurposed for retaining walls, while smaller stones and pebbles were used for courtyard flooring. Bricks were sourced from nearby kilns in their raw, unfinished form, preserving their natural texture and robustness.

The structure employs a traditional load-bearing construction technique, using minimal concrete and lime-mixed mortar to bind the bricks. The decision to keep the walls exposed without plaster not only enhances the rustic aesthetic but also reduces material consumption and maintenance requirements.

Local artisans, masons, and craftspeople from Kaggalipura were actively involved in the construction process, transforming the project into a community-driven initiative that promotes skill-sharing and economic upliftment.

A Flexible and Community-Oriented Space

Originally conceived as a weekend farmhouse, the project evolved into a versatile space that serves multiple functions, benefiting both the client and the local community. The interconnected caves and courtyards can be adapted for various uses, including:

• A homestay or retreat for visitors seeking an immersive natural experience
• A kindergarten or primary school for local children
• A community gathering space for village events and activities
• An artist residency where artisans can practice, teach, and showcase their crafts

The open courtyards act as flexible spillover spaces that can transition between different functions. For example, they can be used as classrooms during the day and performance areas or markets in the evening. The sunken passageways, lined with niches, serve as exhibition spaces for local crafts, promoting indigenous artistry.

Reimagining Sustainable Living

Subterranean Ruins is a testament to the power of architecture in fostering ecological harmony and social engagement. By embracing local materials, traditional craftsmanship, and a flexible spatial arrangement, the project offers a blueprint for sustainable and community-driven design. It challenges conventional notions of permanence, instead celebrating the evolving relationship between built environments and the natural world.