The operator said the acquisition "signalled a major step into a new market and an ambition to grow its style of responsible small-group travel in Europe".
Amsterdam-headquartered Sawadee is one of the Netherlands’ largest experiential operators, offering more than 250 trips across 100 countries, staffed by a team of 180.
The acquisition, which was completed on Friday (31 January), will add €60 million (£50 million) in revenue and €3 million (£2.5 million) in earnings to Intrepid’s balance sheet, and deliver an additional 20,000 customers a year.
