Largest dome igloo (ice)

According to Official Guinness Records,

The largest dome igloo with an internal diameter of 9.2 m (30 ft 5.5 in) and an internal height of 5.3 m (17 ft 8 in) was constructed by ZIP ZAG.ca (Canada) in Grand Falls, NB, Canada, and was completed on 19 February 2011.
2500 ice blocks were used to make the igloo. The external measurements were 9.89m (32 ft 5.5 in) high and 5.68 m (18 ft 8 in) wide.

For a complete list of 2010 records, please visit 2010 Guinness Records in Canada.

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