Blå Jungfrun rises in lonely majesty, distinguished by its shape and size from all other islands in the Kalmarsund archipelago. This bald granite dome stands 86 metres above sea level and 130 metres above sea bottom.
Blå Jungfrun stands out as a grey-blue silhouette far out from sea and considering its isolated location and the colours of its contours, it's not strange that Blå Jungfrun is featured in folklore and myths. When it comes to geology, Blå Jungfrun is a unique dome of isolated red granite. The granite rocks on the island have been polished almost completely smooth by ice and water over thousands of years.
Oak forest with lime, maple and aspen grows on the southern slopes. The largest oaks are several hundred years old. The species-rich flora includes woodruff, coralroot and angular Solomon's seal. Windswept pine forest grows on the northern side of the island.
Carl von Linnaeus was the first person to describe the island, in 1745, after a visit during his journey to Öland and Gotland. He wrote about the rich amount of ivy in the deciduous forest and about the Trojeborgen stone maze on the southern part of the island.