The 10 most beautiful secret gardens in Europe have been revealed. There's a Polish accent.

From Madrid to Prague, The Guardian explored Europe's most beautiful gardens, off the beaten track. Among the 10 most stunning "hidden gems," the British newspaper selected the Garden on the Roof of the University of Warsaw Library.

" The roof garden of the University of Warsaw Library is one of the largest roof gardens in Europe (...). It opened in 2002 and remains a little-known escape from the hustle and bustle of Powiśle. A gentle slope leads to the lower garden, which features a duck pond and a series of granite sculptures. The upper garden is divided into four colorful sections: gold, silver, red, and green. These areas are connected by paths, bridges, and pergolas, and a water cascade connects the upper and lower sections. The garden offers panoramic views of Warsaw," writes the Guardian editor.

It was mentioned that the upper garden is open from April to October, while the lower one is available all year round.

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The Warsaw garden is among the distinguished group. The ten most beautiful gardens in Europe also include El Capricho Park in Madrid, the Onion Garden in London, the Anne Frank Garden in Paris, the Brera Botanical Garden in Milan, the Centralbadets Garden in Stockholm, the Royal Library Garden in Copenhagen, the Károlyi-kert Garden – considered the oldest garden in Budapest, the Vrtba Garden in Prague, and the Diomede Botanical Garden in Athens.