Yamuna Bio-diversity Park: The Yamuna Biodiversity Parks, Delhi is slated to act as a heritage site and repository of approximately 50 communities of endangered species of flora & fauna on Yamuna river basin. DDA has proposed to develop over an area of 456 acres, which will be constructed in phasewise i.e. 156 acres in first phase, another 300 acres in the second phase. The total cost of the first phase of the project is envisaged to be Rs. 18.68 cores. This park comprises of poly house, net house interpretation center, main nature trail, meandering water body and wetlands, with ancillary facilities in visitor's area. So far, 107500 numbers of saplings of different species found in the Yamuna river basin have been planted in as well as 1500 number of saplings of different varieties of fruit trees have been planted in the orchard area.

Aravali Bio-diversity Park: DDA is developing Aravali Bio-diversity Park in an area of 227 ha. near Vasant Vihar, which will be completed in 10 years in phase manner. Total estimated costs for phase-I development is Rs. 15.90 crores, which comprises of development of herbal/medicinal gardens, butterfly park, Oechidarium, fernarium, tropical rainforest etc.