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If accessed from the street Cardinal Vidal i Barraquer has an overview of the gardens, which are very large, but they offer good views of the Carmel hill thanks to its sloping position.
The rainbow is a large community park: a gathering place under thick trees, set to quite different areas that show the successive phases of construction over ten years. The result is a large green area many neighborhood facilities.
The park has its greatest form part of a large irregular triangle, completely covered with trees and grass sparse. The floor is low, the essential cross the triangle from one end or rub it and access space from the Ronda de Sant Martí.
history
This park was built in a former farm fields among the many that until the middle of last century, occupied a good part of the district of San Martin, one of the last strongholds of Barcelona agriculture. The space is part of Old Verneda rainbow. Since the sixteenth century, this nucleus formed the parish of St. Martin de Provençals, the rectory, the inn, farmhouses and other rural buildings scattered around the place
biodiversity
In the broader park lawn shares the limelight with trees. The large canopy of rosewood (Tipuana types) that do a good shade for those who want to contrast with the slender cypress (Cupressus sempervirens). They are two of the many tree species there, the diversity of which is planted with fruit of the popular made in this green space. Very close access to the Ronda de Sant Martí, towering poplars (Populus alba) -very abundant around the parc- reflected in the waters of a pond. Close to the water, a Siberian elm (Ulmus pumila) stands out for its immense magnificence. At one end of the park, a row of alders (Alnus glutinosa) reminds us of the primordial tree that gave its name to the area. In different areas of the park, the orange (Citrus siensis) and olive (Olea europea) recalls the agricultural past of this green space in Barcelona
Landscaping and Design
Once we crossed the street in this section of Menorca, which is cut to the circulation of vehicles-, there is another distinct part of the park. It's a great place, grim and silent, surrounded by trees and a large paved area where, for example, can play ball. In the two upper ends of the square, a playground and an area with benches, surrounded by hedges, invite you to spend some quiet time away from the noise of the city
Art and Architecture
Entering the street of Agriculture, on the other side of a large square, there is the parish of St. Martin. This is an unusual area of ​​the park where mainly highlight the architectural elements that have endured over time: the church and the houses of Can Cadena, Can Planas and Ca Arno, which now house various district facilities. At Can Cadena house, situated inside the park, there are allotments of Barcelona, ​​with 16 plots cultivated by older district, occupying a total of 800 m2. There are also corrals with farm animals, a composting area and a classroom for training in organic farming. This has made it possible, within the program of environmental education, parks and gardens offer activities for schools to introduce the techniques of farming and animals common to farmer: sheep, chickens, geese, rabbits. .. another environmental aspect to note is the central recruitment photovoltaic counts with the house which generates around 8,724 kWh / year, equivalent to the annual electricity consumption of 4 apartments of 80 m2. The energy produced will save 940 kg / year of CO2 emissions into the atmosphere.

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