Hundreds of curious visitors flock to see Iceland's volcano show is a hit. Take a look!

This is 'the Lava Show,' Iceland's latest tourist attraction which uses reheated lava from a real eruption, Katla volcano over 100 years ago.

The heat emanating is tangible, so much that some of the spectators had to shuffle their seats to remove their coats.

The host Iain MacKinnon joked. "This is the show where you get to experience real molten lava flowing inside of a building, intentionally."

There is the same "wow effect" that people get at an eruption site, MacKinnon said.

Curious visitors flee to watch the jets of lava at Iceland's Mount Fagradalsfjall after two eruptions over the last year just 40 kilometres (25 miles) from Reykjavik.

But not all eruptions are safe.

The lave used in the show retains a hint of sulphur, dangerous toxic gas that normally emanates from an eruption that has dissipated as the rock reheats and melts down so many times.

The show uses over 600 kilos (1,320 pounds) of tephra the rocks ejected from Katla, one of Iceland's most dangerous volcanoes which last erupted in 1918. 

The founder said, "We heat that up to its melting point, which is around 1,100 degrees Celsius (2,000 Fahrenheit) and then we pour it into the room."

Jonsson's company has run a version of the production in Vik in south Iceland since 2018, but the Reykjavik show opened last month. 

He came up with the idea of a lava show when he was standing atop a glacier watching lava flow from Fimmvorduhals, a small eruption that preceded the massive Eyjafjallajokull one in 2010, whose ash cloud disrupted air traffic and stranded more than 10 million travellers.

Iceland is known as the land of fire and ice. It has 33 volcanic systems currently considered active, the highest number in Europe. It has an eruption every five years on average.

"We thought it would be wonderful for Iceland if lava would always be flowing," Jonsson said.