Visiting Iceland isn't exactly cheap – Reykjavik is the most expensive capital to visit in Europe.

But a trip could be about to get even pricier thanks to a new tourist tax.

3 The number of annual visitors to Iceland has increased five times over since 2010 Credit: Getty Images

The country has become one of the hottest holiday destinations in the world recently, thanks to its filming locations for Game Of Thrones, as well as increased awareness of the Blue Lagoon and the Northern Lights.

In fact, it is so popular that the number of annual visitors to the country has increased five times over since 2010, from 490,000 in 2010 to an estimated 2.3 million this year.

Concerned that the rural idyll is about to be overwhelmed, authorities are now considering introducing a new tourism tax by increasing the current levy on hotel rooms, or restricting the numbers that can visit popular locations.

3 The country has become one of the hottest holiday destinations in the world in recent years, thanks to its filming locations for Game Of Thrones and the incredible Blue Lagoon (pictured) Credit: Getty Images

Iceland’s tourism minister Thordis Kolbrun Reykfjord Gylfadottir told Bloomberg: “The sector and all of us have to be careful not to become victims of our own success.

"Some areas are simply unable to facilitate 1 million visitors every year.

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"If we allow more people into areas like that, we’re losing what makes them special - unique pearls of nature that are a part of our image and of what we’re selling.”

The authorities have said that any extra money raised would be put back into improving infrastructure.