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Geothermal Energy and Rainwater Systems Shaping a Modern Visitor Experience

Authors:
Edward Onida, Elina Arzumanian
Geothermal Energy and Rainwater Systems Shaping a Modern Visitor Experience
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Leveraging geothermal energy and a rainwater recovery system, the design integrates a spiky form inspired by local rock formations to house educational exhibits and an observation deck focused on Iceland's geological and historical narratives.
5 key facts about this project
01
Sowilo rune-inspired design reflects local cultural significance.
02
Features a geothermal energy system utilizing nearby hot springs.
03
Incorporates a rainwater recovery system tailored for Iceland’s climate.
04
Multi-level layout offers thematic exhibits on geology and history.
05
Observation deck provides panoramic views of the surrounding landscape.

The Sowilo Tower is located in Iceland, designed to connect with the unique landscape and cultural history of the area. Drawing its name from the Sowilo rune, which stands for strength and light, it represents these themes throughout its structure. The tower features a distinct spiky shape that resembles the local rock formations, blending naturally into its surroundings. It serves as a venue for exhibitions and offers an observation deck, creating opportunities for visitors to learn about Iceland’s history and to appreciate its natural beauty.

Conceptual Foundation

The concept behind the Sowilo Tower is closely linked to the significance of the Sowilo rune, reflecting ideas of energy and illumination. As visitors move through the tower, they encounter different displays related to the geological features of Iceland, local flora and fauna, and the historical context of the nearby Grjótagjá cave. The arrangement of spaces is intentional, inviting exploration and interaction with the informative content presented across various levels of the tower.

Spatial Organization

The layout of the tower consists of five floors, each serving a particular theme connected to Iceland's environment. The ground floor houses an information center and café, providing a welcoming start for visitors. The first floor highlights the history of Grjótagjá, while the second focuses on its geological aspects. The third and fourth floors delve into the region’s flora and fauna and geological diversity, respectively. The design culminates in a panoramic observation deck on the fifth floor, offering extensive views of the Icelandic scenery.

Sustainability and Materiality

Sustainability plays a significant role in the design of the Sowilo Tower, utilizing passive solar strategies to enhance energy efficiency. The building includes windows that are designed to maximize solar gain during winter months. Additionally, a geothermal energy system draws on nearby hot springs for heating needs. Rainwater recovery systems make use of Iceland’s abundant rainfall. Although not all materials are specified, mentions of neutral materials and wood-based engineered components suggest a focus on environmentally friendly building practices.

Technical Features

The construction approach incorporates pre-fabricated technologies, which helps streamline the process and reduces on-site assembly time. This method also aims to lower environmental impact by optimizing the use of resources. The design prioritizes flexibility, allowing future changes or adaptations. Each element of the tower contributes to its overall connection with the landscape, including its upward-reaching form, which naturally draws the eye to the sky and expands outward toward the stunning surroundings.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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