Inside Queen Mary's visit to the Amazon rainforest as royal shares photos from solo trip to Brazil

Queen Mary has given royal fans an insight into her visit to the Amazon rainforest in a new post on social media.

The Australian-born Danish royal shared a video and a series of photos on Thursday, as she undertook a solo four-day royal tour of Brazil.

Her Majesty kicked off her official visit to Brazil with a boat trip on the Amazon River and a subsequent visit to part of the rainforest nature reserve.

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"The Amazon rainforest is called by many the 'lungs of the world'," the caption began.

"In the Adolfo Ducke Forest Reserve, which is an original dry forest area of ​​the Amazon forest, the Queen could experience the rainforest up close from an observation tower."

For the outing, the 52-year-old donned a thin green utility shirt with belted brown cargo pants and boots.

The royal accessorised the ensemble with simple gold hoops and two bangles stacked on her left wrist.

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Her auburn locks were in a plait kept to one side, while sunglasses kept loose tendrils off her face during the walk.

Queen Mary changed into a fuchsia pink wrap top with a green patterned skirt for the evening, when she visited the theatre and opera house in the centre of Manaus city.

At Teatro Amazonas, the Danish royal was received by Wilson Lima, the governor of the state of Amazonas, and watched a performance on the cultural history of the Amazon region.

During the visit, Queen Mary will also make a trip to the Brazil's botanical garden in Cerrado, where she'll meet with members of the United Nations Environmental Programme (UNEP).

The Danish royal is the patron of UNEP as well as the United Nations Population Fund (UNFPA) and will also meet with female leaders to discuss equality and the fight against gender-based violence in Brazil and globally.

Advocating for the rights of girls and women has long been a big cause for Queen Mary, dating back to the time when she was Crown Princess Mary.

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