A US man is taking his elderly mother on an all-expenses-paid trip across Europe to mark her 20 years of service as carer to her late husband.

Barton Brooks came up with the idea to treat his mum Carla to a total of 20 European outings after his father Karl died last year.

Each outing would represent a year Carla had spent taking care of Karl, who had suffered a stroke two decades prior.

"My mother’s entire life has been about other people…but especially since my dad’s stroke,” Mr Barton told People.

(www.thelittlegirlfromkansas.com) (www.thelittlegirlfromkansas.com)

Mr Barton said the trip was inspired by the fact his mother had previously used adventure “to heal herself”, backpacking around Europe.

In September, Mr Barton, partner Gregg Goodbrod and Carla began documenting their journey online. Photos and videos posted to their blog show the trio enjoying such sights as the Louvre and Disneyland in Paris.

They have invited the public to send suggestions of other places they should visit.