The leaning tower of Pisa
When the construction of the tower of Pisa began in 1173, not everything went smoothly. The tower began to lean more and more. The project was halted several times and the new floors were built straight, making the tower not only leaning, but also crooked. The leaning makes the tower very unique and therefore the tower has been a tourist attraction for years, bringing in a lot of money.
Once and for all: eradicating the yellow fever mosquito in Aruba
The yellow fever mosquito in South America transmits several diseases in large numbers, including the dengue virus, the yellow fever virus, chikungunya and the Zika virus. The cost of dengue on Aruba is high and many agreed on the need for these actions. It was not possible to raise the intended amount; more than half was promised, but that was all. More parties were sceptical and eventually the project was stopped.