<p>Designed by Gustave Eiffel of the Parisian tower fame together with Charles Garnier, the architect of Monte Carlo Casino, Côte d'Azur Observatory (Observatoire de la Côte d'Azur) opened in 1878 and is still a working astronomy laboratory. Resembling a Greek temple, fronted with Ionic columns but topped by a 92-ton dome covering what was once the largest telescope in the world, the observatory is built on a floating platform that originally allowed the telescope to be easily maneuvered into position; nowadays it is moved by hydraulics. It is regarded as one of the planet’s leading observatories, pioneering research into astrophysics and geosciences.</p><p>Sitting on the hill of Mont Gros behind Nice in a typically Provençal landscapes scattered with olive trees, a visit to the observatory offers unparalleled views over the glamorous Côte d’Azur and the sparkling Mediterranean Sea. It is open for two-hour guided visits only and English-language tours have to be arranged in advance. Occasionally stargazing sessions are held at night.</p>

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