PEDRA BOLIDEIRA (BALANCING ROCK)
This geological marvel lies 18 kilometres outside Chaves. The gigantic rock is so perfectly balanced that anyone can make it turn. This huge ball of granite, is estimated to weigh 100 tonnes. No problem though – you can set it in motion with just one finger!
For two thousand years water has flowed under the Trajano bridge and people have crossed over it. With a span of approximately one hundred and fifty metres, it has two columns bearing Latin inscriptions that are still legible. The masterpiece of the city.