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Basalt Stone and Exposed Concrete Visitor Center Embracing Geological Formations

Author:
Frederik Cuyvers
Basalt Stone and Exposed Concrete Visitor Center Embracing Geological Formations

Project in-detail

Emerging from the Icelandic landscape, the visitor center utilizes reinforced concrete and basalt stone to reflect the geological features of its surroundings while providing direct access to the nearby lava cave.
5 key facts about this project
01
The building is primarily located underground to minimize visual disruption.
02
Basalt stone is used extensively for the courtyard and stairways.
03
The structure's form resembles a butterfly, reflecting its geological inspiration.
04
Reinforced exposed concrete features vertical planks that echo local geological formations.
05
Cross-laminated timber contributes to the interior warmth and structural integrity.

The Butterfly Cave Tower is located in Iceland, near a lava cave, and serves as a visitor center that connects people with the natural landscape. Its design draws inspiration from geological features, specifically the fissures created by tectonic plate movements. The building is primarily underground, featuring sloping roofs that rise from the ground. This arrangement helps to preserve the scenic view while providing a unique experience for those who visit.

Design and Layout

The visitor center includes two main entrances positioned on the north and south sides. The entrance located on the north houses an information stand, which is integrated into the exposed concrete wall and assists visitors in navigating the space. The layout facilitates movement toward the lava cave, allowing guests to easily explore the natural features of the area.



Spatial Organization

At the core of the structure is a central courtyard that connects various public areas, including a ticketing section, a café, and a multipurpose room. This configuration encourages accessibility, particularly with the elevator placed close to the ticket area, which simplifies circulation for all visitors. Essential service areas, such as restrooms and additional seating, are kept separate from the main pathways, promoting an efficient flow of foot traffic.



Materiality and Construction

Reinforced exposed concrete is the primary material for the building's exterior. Its textured surface resembles natural geological formations, helping the structure merge with its surroundings. The groundwork includes basalt natural stone, featured prominently in the courtyard and stairways, enhancing the overall connection to the local environment. The roof is equipped with stainless steel panels, which provide durability and improve energy efficiency.



Interior Experience

Inside, a ribbed timber structure made of cross-laminated timber supports the building, resulting in a warm aesthetic that contrasts with the concrete exterior. Spruce plywood is used for cabinets and lockers, maintaining functional coherence throughout the space. The flooring, finished with basalt stone, ties the interior back to the natural elements outside. The design effectively promotes a relationship between the building and its landscape, inviting visitors to engage thoughtfully with both architecture and nature.

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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

MICROHOME

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € Prize Fund / Kingpsan Edition #10 ideas COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Final registration deadline 25 September 2025

Enter an open architecture
competition now

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