Get inspired!

17,725 architecture projects

Learn from past Buildner architecture competition participants through our extensive project library, curated over more than 15 years!

Elevated Viewing Platform with Photovoltaic Facade Uniting Nature and Community

Authors:
Catharina Schönemann, Alicia Michalke
Elevated Viewing Platform with Photovoltaic Facade Uniting Nature and Community
Explore the full project presentation!
Subscribers only
With a cave tower that functions as a 360-degree viewing platform and a photovoltaic facade to harness renewable energy, the design serves as both a visitor center and hotel, enhancing the natural landscape of Northern Iceland.
5 key facts about this project
01
A cave tower allows for 360-degree rotation and expansive views of the landscape.
02
The design includes changing and shower facilities for direct access to nearby thermal baths.
03
A photovoltaic facade generates renewable energy to power the visitor center.
04
Elevated structures provide a floating effect that integrates with the rugged terrain.
05
Communal areas encourage social interaction among visitors while enjoying the natural scenery.

The Space Tower project is located in Northern Iceland, a region rich in unique geological features and thermal activity, especially near the Grjótagjá caves. It serves as both a visitor center and hotel, designed to improve tourist engagement with the stunning natural surroundings. The key design principle focuses on aligning the man-made structures with the landscape, allowing for a comfortable experience that encourages exploration and connection with the area.

Design Concept

The visitor center is a cuboid structure positioned on elevated pillars, creating a floating appearance that adapts to the uneven ground. This design choice enhances the connection between the building and its environment, facilitating a unique viewing experience of the landscape. Inside, the layout prioritizes functionality, with large windows designed to capture expansive views. Communal areas like cafés and waiting spots provide spaces for visitors to relax and interact. Practical amenities such as changing rooms and showers have been included to accommodate guests using the nearby thermal baths.

Viewing Platform

A prominent feature of the design is the cave tower, designed specifically as a viewing platform. Elevated on three pillars, it resembles a telescope capable of rotating 360 degrees. This design allows visitors to take in the wide-ranging views of the surrounding lava fields and volcanoes. Standing nine meters tall, the tower acts as a lookout, inviting people to immerse themselves in the dramatic Icelandic landscape.

Sustainable Design

Sustainability is an integral part of the design, highlighted by the use of a photovoltaic facade. This feature not only contributes to the modern look of the visitor center and hotel but also generates renewable energy for the facility’s needs. By focusing on energy efficiency, the project aims to lessen the environmental impact of tourism in the area, while adhering to contemporary ecological standards.

Hotel Design

Next to the visitor center, the hotel continues the same architectural style. Its open floor plan includes social spaces such as a fireplace and restaurant, designed to foster community among guests. A bar and billiard area further promote interaction, adding to the overall experience. Each guest room is elevated on pillars in line with the visitor center and cave tower, allowing for wide views of the natural scenery. Floor-to-ceiling windows frame the breathtaking Icelandic landscape and create a connection between the interior and exterior spaces.

The design of both the visitor center and the hotel emphasizes a strong relationship with the environment. Every aspect, from positioning to layout, is planned to ensure visitors can appreciate the beauty of the surroundings. This thoughtful approach highlights a commitment to creating spaces that prioritize user experience while respecting the unique landscape of Iceland.

Noticed a mistake?
Highlight the text and click on
Noticed a mistake

Enter an open architecture
competition now

The Home of 
Shadows
The Home of Shadows
The light studies. Edition #4
The Next House: USA
The Next House: USA
20,000 USD Prize
The Architect's 
Chair
The Architect's Chair
Take a seat and make a statement! Edition #5
Kinderspace
Kinderspace
Architecture for Children’s Development #3
The Architect’s 
Stair
The Architect’s Stair
Take a step and make a statement! Edition #3
Buildner's Unbuilt Award 2026
Buildner's Unbuilt Award 2026
100,000€ Prize / 2026

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

`
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.

The Next House: USA

Design the next suburban home for the USA

20,000 USD Prize ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 19 November 2025

Open architecture competitions

  • Closest deadline first
  • Project competitions first
    Selected winning projects have the potential to be constructed
  • Ideas competitions
    Experimental competitions with the focus on pushing the boundaries of creativity
new
The Next House: USA

Design the next suburban home for the USA

20,000 USD Prize ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 19 November 2025
new
Iceland 
Slow Sauna

Design slow sauna in Iceland

project COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 26 November 2025
Concrete 
Pavilion

Design a concrete pavilion

Edition #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 27 November 2025
new
Pavilion Atlas 2026

Design a story of your country

ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 21 January 2026

Recurring architecture competitions

new
The Home of 
Shadows

Design a home with no artificial lighting

The light studies. Edition #4 ideas COMPETITION
Prize Monetary award
Eligibility OPEN TO ALL
Early bird registration deadline 5 November 2025
The Last 
Nuclear Bomb Memorial

Design a memorial that speaks to the cause of ending all nuclear weapons programs

Edition #6 ideas COMPETITION SILENT CONTEST For this competition, NO DESCRIPTION TEXT is allowed. The architecture ideas must be communicated strictly with visuals.
Prize Monetary award
Eligibility Open to all
Final registration deadline 13 November 2025
new
The Architect's 
Chair

Take a seat and make a statement!

Take a seat and make a statement! Edition #5 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 20 November 2025
Hospice - 
Home for the 
Terminally ill

Design a safe and supportive space to those struggling with a terminal illness

Edition #5 ideas COMPETITION
Prize 10,000 €
Eligibility Open to all
Final registration deadline 26 November 2025
Kinderspace

Design a kindergarten of tomorrow

Architecture for Children’s Development #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 26 November 2025
Museum of 
Emotions

Use architecture to create different emotional states

Edition #7 ideas COMPETITION SILENT CONTEST For this competition, NO DESCRIPTION TEXT is allowed. The architecture ideas must be communicated strictly with visuals.
Prize Monetary award
Eligibility Open to all
Final registration deadline 27 November 2025
Re:Form - 
New Life 
for Old Spaces

Choose a site—used, abandoned, or forgotten—anywhere in the world, and give it a new purpose

Edition #2 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 3 December 2025
The Architect’s 
Stair

Take a step and make a statement!

Take a step and make a statement! Edition #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 15 January 2026
new
Buildner's Unbuilt Award 2026

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2026 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Early bird registration deadline 26 February 2026

Media, partners and clients

To view this project in detail,
please log in with your
Architects’ Network Plus account.
Subscription instantly unlocks all the architecture projects plus other member-only benefits:
  • Access the 17,725 Concept Library
  • Professional tools including file transfer, email, portfolio management, and more
Register now
Already a member? Log in

This website uses cookies to improve user experience and gather usage statistics.

More information is available in our Privacy & Cookie policy