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Mobile beehives on the back of large trucks are used to pollinate fields of rape and sunflowers in Romania

As the boundary between tectonic plates the region is subject to occasional earthquakes. Strong tremors greater than magnitude 7 occur on average every 58 years. The most recent (mag 7.4) was in 1986, while a mag 7.1 earthquake in 1977 severely damaged the Romanian town of Zimnicea (Stage 22).

Wildlife

While a number of small mammals and reptiles (including rabbits, hares, red squirrels, voles, water rats, weasels and snakes) may be seen scuttling across the track and deer glimpsed in forests, this is not a route inhabited by rare animals. European beaver, which had been hunted to extinction throughout the lower Danube during the 19th century, have been successfully reintroduced in a number of locations including the Gemenc national park (Hungary, Stage 4), Kopački rit nature reserve (Croatia, Stage 6) and River Olt (Romania, Stage 21) from where they have spread down river as far as the Danube Delta. As they are mainly nocturnal, your chances of seeing a beaver are slight, although you may spot a lodge. Wild boar are indigenous throughout the route, being particularly numerous in Kopački rit.