This area is highly valued as one of Scotland's national treasures and has recently obtained UNESCO World Heritage Site recognition due to its significant global impact on nature.
During his visit, The King unveiled a commemorative plaque marking the area's designation as the seventh world heritage site in Scotland and the 35th in Britain.
This natural landscape holds around 400 million tonnes of carbon, exceeding the total amount stored in all of the UK's forests and woodlands combined.
Known as a blanket bog because of its blanket-like coverage over the terrain, this globally rare habitat is exceptionally suited to Scotland's climate and maritime setting.
Peat bogs play a vital role in combating climate change by trapping carbon and preventing its release as carbon dioxide.
Upon reaching the visitor center, His Majesty engaged with staff members from the Highland Council, NatureScot, Royal Society for the Protection of Birds (RSPB) - an organization for which he serves as Patron - and other local groups involved in conserving the landscape.
They highlighted the significance of the Flow Country for both people and nature.
The King witnessed firsthand how the peatlands operate as a hub for research and as a habitat for a diverse range of plants and wildlife.
He also learned about how the area provides economic prospects and opportunities for young individuals to connect with the natural environment.
During a community gathering outdoors, The King conversed with local businesses and families.
An orchestra of children, known as Feis air an Oir - translating to Festival on the Edge in Gaelic - entertained The King, with many youngsters showcasing their fiddling skills.
Some of the performances featured Gaelic songs like Sine Bhan, while Mairi's Wedding was sung in English.
The King joined the young musicians for a group photo.