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A rain garden has been implemented at the Fazenda Lagoa do Nado Municipal Park in Belo Horizonte. The rain garden has been created as "a solution that contributes to the runoff of rainwater, allowing the water to be filtered through vegetation and infiltrate into the soil", with this type of solution being recognised as a method which "recharge[s] the water table, increases biodiversity, improves the local microclimate and air quality" (Ref. 1). The rain garden has been created as a demonstration project within the wider INTERACT-Bio project which is led by the global Local Governments for Sustainability network, ICLEI (International Council for Local Environmental Initiatives) (Ref. 1). As summarised by President of the Municipal Parks and Zoobotany Foundation of Belo Horizonte, Sérgio Augusto Domingues, “This is an important experiment that enables solutions based on nature. The idea is that it, like other mechanisms, complements macro-drainage interventions, helping the city to be more resilient to extreme events related to climate change" (Ref. 3).
According to the Municipality of Belo Horizonte, the Multiannual Government Action Plan (PPAG) aims to implement 30 rain gardens in the municipality by 2025, each garden having an area of ​​150 square meters (Ref. 7).

'Blok 54' is a new building on the city island IJburg in Amsterdam, on which a green roof and rain garden were be created in which stormwater can flow from the green roof through a groove with diverse vegetation, reflecting a natural creek. The vegetation with fruit bushes serves as a sensory garden for poly handicapped children and the creek flows into bioswales through which can slowly infiltrate. Blok 54 can thereby be considered an ECOcity-garden. (1,3)

The extensive Rain Garden Project underneath the Begumpet flyover was carried out in Hyderabad City of Telangana State in India as a beautification project, creating a wetland system banked by lush vegetation (1,2, 4). The Hyderabad Metropolitan Development Authority (HMDA) developed this project to restore, conserve and regenerate the environment of stormwater drains (locally named as open 'Nalas') (1,2,3,6). This project is located at the intersection of Kukatpally Nala and Yousufguda Nala and stretches over 2 hectares and runs for 400 meters (1,2). The project was created for a more natural flow of stormwater to allow it to soak into the ground as well as reduce mosquito breeding on Nala (1,2). It was completed in 2018, creating a positive impact, through which the Hyderabad Metropolitan Development Authority (HMDA) further decided to develop more such projects in other parts of the city (4). Hyderabad City was also awarded for this project under the green and clean city category - Smart Cities India (SCI) Awards (5).

The largest rain gardens in Sweden (thus far) has been created in Göteborg (Kviberg park). Kviberg's multisport arena was completed in the summer of 2015 in the northeastern part of Göteborg. Around the facility, there are parking spaces with a capacity for 500 cars. In order to handle the rainwater flowing from the parking area, approximately five per cent of the total area has been used for rain gardens, which both clean and store the rainwater. (Ref. 1, 2)

The project is a part of a larger initiative to revitalize this neglected district of the city and involves redevelopment and expansion of rain drainage system in Gdynia Chylonia. It resulted in the construction of rainwater retention systems and rainwater sewage systems with safe rainwater discharge to the Chylonka River. The aim of the wider initiative is to ensure a more decent standard of living and social cohesion by revitalizing the neglected areas of Gdynia [1,2,4].

In 2010, to revamp the Raja Musa Forest Reserve (RMFR), a rehabilitation project was initiated by the Friends of North Selangor Peat Swamp Forest Association (a local NGO) in collaboration with governmental and non-governmental stakeholders. As part of the largest peat swamp forest complex on the West Coast of Peninsular Malaysia, the Raja Musa Forest Reserve (RMFR) is an important home to many threatened species, as well as a valuable ecosystem in the fight against global warming. Despite this, over the years the forest has been subjected to fires and illegal encroachment which severely reduced its area (1). The project was considered unique as it was an innovation aimed to enhance and strengthen the capacity of the local community in peatland water management and forest rehabilitation works (3,5). Activities included among others rehabilitation of the degraded peat forest through the plantation of new seedlings, demonstration of, and provision of a documentary model for community-based peat swamp forest rehabilitation, as well as the creation of an awareness programme with the local community and dissemination of educational materials (2).
The importance of the intervention consists not only in the implementer's approach in regard to nature-based solutions but also in its aim of documenting a "model of low-cost hydrologic restoration of peat swamp forest" which ultimately should be replicated in similar conditions but in various locations (2).

The Rajakori lake rejuvenation project aimed at reviving an existing lake using a natural and sustainable treatment system, the "Scientific Wetland with Active Biodigester (SWAB)". SWAB technology uses a two-step process involving (i) a sedimentation tank equipped with a biodigester and (ii) a constructed wetland system. The untreated sewage waste is passed through this two-step process that uses microbes and plants to reduce pollutant levels. The project also involved redeveloping the public space around the lake for community use (Ref 1,2). Before 2017, the lake was overfilled with sewage and waste from nearby neighbourhoods due to a lack of proper sewage management. Initiated by the Delhi Government, the project aimed at using low-cost natural methods rather than conventional techniques involving concretized bases and chemicals to treat water (Ref 1, 4). Due to its success and cost-effectiveness, this project now serves as an excellent example for other projects within Delhi (Ref 5).

The Rákos-patak Green Corridor is a large-scale development project aimed at revitalizing the environment of the Rákos Stream on a 23 kilometre long path from it's areas in the outskirts of Budapest to the city center. The most important element of the development project is the planned bicycle lane, which would connect the already existing bicycle lanes along the stream into a full 23 kilometre one. In some areas of the planned corridor, other developments will happen with the goal of preserving and restoring habitats which originally existed in the area before it was first regulated. Near the outer areas of the stream, afforestation will also take place. (Reference 9) The area of the stream is currently underdeveloped. According to the plans, the new green corridor could help decrease urban stress.

Rehabilitation project of the Ranillas stream and its surrounding area, as part of the larger city project to rehabilitate the waterways connected to the Guadalquivir River. The project included transforming the covered canal into a green corridor connecting the Tamarguillo Park with the Infanta Elena Park. It sought to build pedestrian walkways, leisure spaces, lengthen the bike lanes, increase tree cover, and restructure the covering of the canal. (Ref 1-6)

The Ras Mekonnen Urban Park is part of a larger intervention developed by ICLEI (an international NGO focused on the promotion of sustainable development) with the Addis Ababa municipality alongside the Shega river that crosses a nearby neighbourhood. The location of the park was initially used by locals as a dumping site affecting not only the quality of life of the inhabitants but also contributing to the environmental degradation of the area. As more and more people discarded their waste here, the small river running through the site, a tributary of the Shega River, became increasingly overgrown and inaccessible, resulting in a derelict, run-down space in an otherwise vibrant urban area. As such, action was needed, which eventually resulted in the rehabilitation of the river and the creation of the park, which now can be enjoyed by all the inhabitants of the Ras Makonnen neighbourhood. (1,2)