Exotic Garden of Monaco and Observatory Cave
In a nutshell:
- The Monaco Exotic Garden offers spectacular views over the Principality and the sea.
- Over 1,000 species of succulent and exotic plants thrive there all year round.
- A visit to the garden can also include a tour of the Grotte de l’Observatoire and the Botanical Centre.
- Reopened in March 2026 following several years of renovation, the site combines botanical and historical heritage with new, visitor-friendly spaces.
The Monaco Exotic Garden: a green balcony between sky and sea
Since 1933, the Monaco Exotic Garden has been one of the jewels of the Riviera. Perched on the cliffside, it boasts a remarkable collection of succulents and exotic plants from all corners of the world. Cacti, agaves, aloes and crassulas thrive here, enjoying the Mediterranean climate to flourish all year round.
The diversity of plant life is impressive: over 1,000 species of succulents and xerophytes are represented, originating mainly from Latin America and North America, southern and central Africa, and the Arabian Peninsula. Each season reveals its own treasures, from winter blooms to bursts of spring colour. The path winds its way through spectacularly shaped and vibrantly coloured flowerbeds. At every turn, breathtaking views open up over the sea and Monaco’s Old town.
Opposite the garden, the Botanical Centre – a dedicated conservation facility – is home to over 10,500 protected plant species and plays an active role in preserving this exceptional botanical heritage.
On 30 March 2026, the Exotic Garden reopened its doors following six years of safety improvements and a complete modernisation. New areas dedicated to children, picnics and light refreshments now enhance the visitor experience. The reopening of the Monaco Exotic Garden thus marks the return of one of Monaco’s must-see attractions, at the crossroads of heritage, science and wonder.
The Observatory Cave: a descent into the heart of the rock
Below the garden, another wonder awaits visitors: the Grotte de l’Observatoire. Discovered in 1916 whilst the garden’s foundations were being laid, this natural cave invites visitors on a true underground exploration. Access is via an impressive staircase of over 300 steps, which winds its way through galleries adorned with spectacular limestone formations.
Stalactites, stalagmites, draperies and columns intertwine, sculpted drop by drop over millennia by water rich in carbon dioxide. The guided tour, led by specialists, takes visitors from 98 metres below to 40 metres above sea level, offering a deeper understanding of the geological phenomena behind these remarkable formations, in an atmosphere that is both peaceful and fascinating.
The Grotte de l’Observatoire is a valuable record of the region’s geological history. Indeed, numerous remains have been found there, bearing witness to the ecosystems and climatic changes that have occurred over the past 250,000 years. They also provide irrefutable evidence of the presence of prehistoric humans on Monegasque territory.
Situated right next to the garden, the Monaco Museum of Prehistoric Anthropology provides the perfect complement to a visit to the site. Its collections trace the major stages in human evolution, following the succession of glacial and interglacial periods. It is one of the Principality’s oldest scientific institutions, housed in a building designed by the local architect Louis Rué.
A site steeped in history and science
In the early 20th century, spurred on by Prince Albert I – a great explorer and patron of the sciences – plans were drawn up for a garden bringing together rare species from the world’s arid regions. Passionate about botany and the acclimatisation of exotic plants, the Prince sought to make Monaco a true centre for the study and discovery of the plant world.
Work began in 1913, and it was not until 1933 that the garden was officially opened by Prince Louis II. The site’s steep topography, which was once difficult to access, was put to good use to create a spectacular cliff-side walkway, punctuated by steps and viewing points offering breathtaking views of the Mediterranean. This unique layout continues to contribute to the charm of the Exotic Garden to this day.
As for the Grotte de l’Observatoire, it owes its name to its proximity to a former astronomical observatory. Discovered in 1916 during work on the garden, it has been open to the public since 1950.
Today, the site continues to fulfil its scientific and cultural mission through the botanical walk, guided tours of the cave, temporary exhibitions and various educational activities. Following several years of renovation and safety improvements, the Monaco Exotic Garden is more determined than ever to showcase its natural, historical and scientific heritage, within a setting that has been completely refurbished for the comfort of visitors.
Practical information
The Exotic Garden is open all year round except on 19 November, 25 December and during the Formula 1 Louis Vuitton Monaco Grand Prix.
Special evening openings are held on fireworks nights so visitors can enjoy the views from the first terrace.
Opening hours:
- January – November – December: 9.00 am – 5.00 pm
- February – March – April – October: 9.00 am – 6.00 pm
- May to September: 9.00 am – 7.00 pm
Guided tour of the Grotte de l’Observatoire: departs every hour from 10.00 – Duration: 40 to 45 minutes.
Guided tour of the Botanical Centre: Tuesdays at 14.00, and from Wednesday to Saturday from 10.00 to 14.00.
Free entry for CMI (Mobility and Inclusion Card) holders and people with reduced mobility.
Accessibility: Due to the site’s topography, access for wheelchair users is limited to the platform at the entrance to the exhibition hall.