IT IS the TV series which has caused visitors numbers to soar across the historic and eyecatching Scottish attractions featured in the last five years.

There is even a term for the way in which the five-year-old drama based upon author Diana Gabaldon's historical time travel book series has boosted the tourism economy of Scotland - "the Outlander effect".

The number of visitors flocking to the castles, palaces, mansion houses, heritage villages and country parks that are featured in Outlander are estimated to have risen by 67 per cent between 2013 and 2017 - from 887,000 to 1.5million.

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Now to further capitalise on the Outlander effect, Visit Scotland have revamped a locations map - to include a host of locations from the fourth season of the show.

A former parish church in Glasgow’s Merchant City is one of eight new locations that feature in the fourth season of the time-travelling romantic television adventure series starring Sam Heughan as 18th-century Scottish Highlander Jamie Fraser and his time-traveling wife, a 20th-century English doctor named Claire Randall Fraser played by Caitriona Balfe.

St Andrew’s in the Square, Glasgow, now home to the Centre for Scottish Culture and a popular wedding venue, stands in for the interior of the Wilmington theatre, North Carolina where Jamie and Claire attend a play with Governor Tyron. It is said that the production crew took 48 hours to give it a total overhaul in terms of the dressing, building a huge proscenium arch with rich red velvets and a huge gilded candelabra.

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Also added is Calderglen Country Park which is home to a zoo, nature trails, golf course, gardens and historic Torrance House. But it also provided one of the most dramatic moments of the fourth series, as it doubled as the gloomy and dangerous forests of 18th-century North Carolina.

This is where Jamie Fraser and his young son in period costume go hunting and fishing with dangerous consequences.

READ MORE: Outlander fans dig deep to save Preston Mill

On the map too is the University of Stirling. The walkway between the university buildings became the Boston Airport walkway where Claire and Jamie's daughter Brianna Fraser meet Roger MacKenzie off a plane when he arrives to visit.

The Outlander map has more details than ever before to help visitors find precisely what they are looking for, including postcodes and whether the on-screen locations feature parking, toilet facilities, admission fees and eateries.

The set-jetting map now features 43 of the Scottish locations used in the hit Sony Pictures Television show for fans to explore.

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Jenni Steele, film and creative industries manager at VisitScotland, said: “Outlander continues to have a massive effect on Scottish tourism with fans flocking to the sites that have appeared in or have a historical connection to the hit television show.

"With an astonishing 43 locations used over the past four series, there is so much of the country for fans to explore.

"Our new and improved guide gives visitors even more information about on-site facilities to allow them to plan appropriately to make the most out of their trip.

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Also added to the map, is the 17th century Palladian villa Newhailes House in East Lothian which serves as Governor Tyron’s home in North Carolina, where Jamie discusses the offer of a land grant in exchange for service to the English Crown, and where Jamie and Claire are introduced into Wilmington society.

Also featuring as the North Carolina wilderness is the 913 acre Beecraigs Country Park in West Lothian. This is where Jamie and Claire ride through after leaving River Run. On the journey through the forest, they became separated during a thunderstorm and Claire are haunted by the ghost of Otter-Tooth.

Arniston House in Midlothian (below), home to the Dundas family for more than 400 years, became the theatre entrance and lobby where Jamie and Claire attend a play in Wilmington with Governor Tyron and where Claire’s medical skills saved Edward Fanning’s life.

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Gray Buchanan Park, Polmont – known locally as Parkhill also features. The woodland alongside the meandering Polmont burn doubled as a Charleston graveyard.

The woodlands at Dunkeld House Hotel in Perthshire were also used as North Carolina wilderness.

Ms Steele added: “Not all the filming locations used in the show are listed as some may be on private property, where the owners don’t want their involvement promoted. Other locations may be too small or delicate to cope with large numbers of visitors, while some may be too tricky or even dangerous for visitors to get to.”

Outlander author Diana Gabaldon received an award for boosting Scottish tourism through her fantasy saga in March.

The US writer, 67, received an International Contribution to Scottish Tourism award at the Scottish Thistle awards.

The Outlander Effect and Tourism paper, revealed that Doune Castle, near Dunblane, which doubles as the programme's Castle Leoch, has seen the largest surge of visitors as a result of the show's appeal - 226.5% between 2013 and 2017.

Numbers at Blackness Castle, near Linlithgow, which features as Black Jack Randall's headquarters, increased by 181.7%.

And Glasgow Cathedral's visitors increased by 66.8% after it was screened as a French hospital.