At first, you may think this is just footage panning over a beautiful lake.

But soon you realise the incredible waters in Serra de Estrela in Portugal hide a bizarre secret.

Filmed by a drone, you can see a huge hole in the river, with water pouring down beneath.

The hole seems like a vortex, consuming the waters around it.

But unfortunately this isn’t a portal into another dimension.

It’s a dam built in 1955 that is responsible for the water diversion between Ribeira das Naves to Bayou Lagoon Long.

There you have it. Still beautiful to look at though.




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