Get inspired!

17,725 architecture projects

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

Natural Filtration Through Crushed Stone and Green Oases in Urban Revitalization

Authors:
Lev Sitnikov, Aidar Aminov, Pavel Kosenkov
Natural Filtration Through Crushed Stone and Green Oases in Urban Revitalization
Explore the full project presentation!
Subscribers only
Utilizing natural filtration with crushed stone and integrating urban oases, the revitalization of the Navigli Canal enhances water quality and fosters community interaction in a historically significant setting.
5 key facts about this project
01
Revitalizes a historic canal through sustainable water purification techniques.
02
Incorporates urban oases to enhance biodiversity and community access.
03
Employs a closed-loop system for water quality improvement using natural filtration.
04
Features children's water playgrounds to encourage local engagement and recreation.
05
Prevents pollution from the nearby Seveso River from entering the city center.

The Navigli Canal reopening project aims to restore and improve a vital urban waterway within a historically significant area. Located in a charming part of the city, the project focuses on turning the canal into both a natural ecosystem and a lively public space. The overall design concept emphasizes the purification of the canal water through a sustainable natural filtration method. This method involves using aquatic plants and layers of crushed stone and sand. The initiative seeks to address environmental issues while promoting community interaction and recreational opportunities along the canal's banks.

Restoration Process

The project begins with the careful cleaning of narrow sections of the canal. This allows for the introduction of aquatic plants that help purify the water. Water flows through large crushed stones, effectively removing contaminants before it passes through finer layers that improve quality further. This filtration process combines biological and mechanical techniques, creating a closed-loop system that supports water health and local wildlife, thereby re-establishing the canal as an important ecological resource.

Enhancing Urban Fabric

In the next phase, the design develops open pools and urban oases, integrating green spaces into the surrounding urban setting. These areas aim to reduce urban density while providing places for residents to connect with nature. By carefully designing landscapes and creating openings in the canal, the project enriches the community’s social environment, encouraging greater interaction with the waterways.

Public Amenities and Accessibility

The design incorporates a range of public amenities, including a public swimming pool and a children’s water playground close to local schools. These spaces not only enhance the user experience but also encourage physical activities and foster environmental awareness among younger generations. Access points and gentle transitions to the water create inviting spots for community engagement with the canal.

Environmental Integrity

The project also takes into account the ecological concerns related to the nearby Seveso River, which has previously posed pollution challenges. By introducing design measures to keep contaminated water from entering the historical center of the city, the project reflects a strong commitment to environmental integrity. The materials chosen, such as crushed stone and sand, are selected for their ecological benefits, supporting the natural filtration system and reinforcing sustainable practices.

The careful integration of natural systems with recreational design provides a new opportunity for the Navigli Canal to serve as a central part of community life and ecological health. The result is a revitalized space that encourages interaction and awareness, making the canal an important asset for both residents and the local environment.

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

Enter an open architecture
competition now

Kingspan MICROHOME 2026: Building Less to Create More

`
Competition organisers

The Kingspan MICROHOME 2026 competition invites architects and designers worldwide to rethink small-scale living by creating an off-grid, modular micro dwelling under 25 m². Now in its 11th edition, the contest emphasizes sustainable, innovative, and human-centered design that demonstrates how compact living can have a big impact.

With a €100,000 prize fund, entries will be evaluated for originality, efficiency, and their response to contemporary environmental and social challenges. The competition is open to everyone, with submissions allowed individually or in teams of up to four. Registration closes on 30 September 2026, and winners will be announced on 15 December 2026.

By celebrating creativity within strict limits, MICROHOME 2026 continues to push the boundaries of compact architecture and sustainable living.

MICROHOME 2026

Design a new concept of small-scale home and share a prize fund of 100,000€

100,000 € Prize Fund / Kingpsan Edition #11 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 September 2026

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 York High Falls 
Riverfront Market

Design a New Riverfront Market in Rochester, New York

ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 7 October 2026
Valli Wine 
Tasting Room

Design a wine tasting room in Italy

project COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 8 October 2026
The 
Quiet 
Tower

Design an observation tower in Latvia

project COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 15 October 2026
Vancouver 
Tall Challenge

Design the future of Vancouver’s skyline

Building higher downtown ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 29 October 2026
The Oak 
Moon 
Pavilion

Design a yoga pavilion in Italy

project COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 5 November 2026
Portugal Long Table 
Restaurant

Design a slow-living restaurant in Portugal

project COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 9 December 2026

Recurring architecture competitions

MICROHOME 2026

Design a new concept of small-scale home and share a prize fund of 100,000€

100,000 € Prize Fund / Kingpsan Edition #11 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 September 2026
Kinderspace

Design a kindergarten of tomorrow

Architecture for Children’s Development #4 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 28 October 2026
Museum of 
Emotions

Use architecture to create different emotional states

Edition #9 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
Advance registration deadline 12 November 2026
The 
Architect's 
Chair

Take a seat and make a statement!

Stockholm Furniture Fair Edition #6 ideas COMPETITION
Prize Monetary award + Exhibition at Stockholm Furniture Fair
Eligibility Open to all
Final registration deadline 3 December 2026
new
Buildner's Unbuilt Award

Celebrating your unbuilt architecture visions with a 50,000€ prize

50,000€ Prize / 2027 ideas COMPETITION
Prize 50,000 €
Eligibility Open to all
Early bird registration deadline 4 February 2027

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