Florarium of Zaryadye Park (Флорариум, "Заповедное посольство" pavilion)

Zaryadye Park, designed by a consortium led by Diller Scofidio + Renfro with Hargreaves Associates, Citymakers and BuroHappold Engineering, was inaugurated on 9 September 2017. According to Cyclowiki, which draws on Ruwiki, the Florarium opened the same day in the "Заповедное посольство" pavilion: it was then a set of glasshouses holding about fifty species, some of which can live only in a hot subtropical climate. It reopened on 25 June 2020 after the pandemic restrictions, in individual or family sessions interspersed with disinfection, according to the TASS agency.

The idea of replacing that collection with an exhibition of plants from every region of Russia is credited to the park's director, Ivan Demidov. "Florarium. Route Russia" opened on 21 May 2021 with plants from 85 regions; the official count is then raised to 89 phytoboxes. On 22 May 2023 a ceremony presented the project with certificates from the INTERRECORD agency and the Russian Records Registry, for the shortest route across Russia holding the most species of natural and cultivated flora: 49.5 m.

According to Cyclowiki, the envelope is a glass funnel 8 m deep, with a spiral staircase running down inside it; the top is closed by a skylight, a glass roof dome. The glass maker AIG cites the Vision 60T and Crystalvision glasses for the pavilion's facade and credits the project to Diller Scofidio + Renfro and A. Asadov, while Cyclowiki attributes the design of the glass structure to the Moscow Poliansky architectural and artistic design institute. On the Cyclowiki photographs, a curved glass wall on a steel frame lets the plants and the pink light of the grow lamps be seen from outside.

The route follows the staircase; metal phytoboxes, at eye level, are fixed to the handrails on both sides. The plants are held in perlite; in each box a tube with nozzles mists a nutrient solution onto the roots, and the surplus returns to the circuit, is purified and sprayed again. Humidity is kept at 40-50% and temperature at 21-23 °C, with shading and conditioned air in summer. The lower part is underground and receives supplementary lighting, which sets this orangery apart from conventional sun-lit glasshouses.

In 2023 "Route Russia" has 89 phytoboxes, one for each subject of the Russian Federation according to the official count, for more than 300 species and 509 plants set out. The route starts from Kaliningrad Oblast, moves through the North-West and central Russia, then the South, whose drought-tolerant and light-loving plants stand under the dome, before following the outer curve of the staircase through the Volga region, the Urals, Siberia and the Far East. Meadow, high-mountain and tundra plants with very different needs share the space; herbaceous plants, shrubs and woody species are all represented.

Plants are chosen by five criteria: symbol or heraldic emblem, rare species of the regional Red Book, plant characteristic of the region, decorative plant, useful plant. The St Petersburg phytobox holds a kumquat and a white cabbage, recalling the vegetable plots of spring 1942; Moscow's has a strawberry; the Tula region's a nettle, celebrated each year at Krapivna; Mari El's burdock, clover, birch and ash, trees and plants sacred to that people. Seeds from the fruit are used to renew the collection.

The Florarium occupies the "Заповедное посольство" pavilion ("Nature Center" on OpenStreetMap), at the centre of the park. Visits are by 30-minute session, for no more than seven people and from the age of 6. Entry is paid and booked by session on the park's website.

The park has other places to explore on foot: an ice cave and an underground museum, according to TASS, the Hovering Bridge, the Northern Landscapes garden and the Zaryadye concert hall. The Apothecaries' Garden (Aptekarsky Ogorod), another glasshouse in this atlas, is about three kilometres away.