A team of British, Estonian and Danish soldiers and officers are cycling more than 1,000 kilometres across Estonia in seven days.
The tour, called 'NATO Velo', started in Tartu on 15 August before heading off on the longest leg of the tour - roughly 170km to Parnu.
From there, the tour headed to the island of Saaremaa and were joined by Estonian President Kersti Kaljulaid for the 150km journey.
The personnel will then head to Hiiumaa before coming back to the mainland and travelling through Tallinn and Narva, where the tour is due to end on 21 August.
The tour has been organised by NATO’s enhanced Forward Presence (eFP), an operation established to halt any potential aggression from Russia.
Colonel Paul Clayton, Commander of the NATO contingent, said the tour will be a "remarkable show of the unity and spirit of co-operation" between the Estonian Defence Force and the British and Danish troops in Estonia.
"The added bonus is the opportunity to enjoy the beautiful Estonian countryside while physically challenging ourselves," he continued.
The NATO battlegroup will also host engagement events, at which Estonians will meet soldiers, see their equipment and learn about NATO and the eFP in Estonia.
Col Clayton said it is "essential" that the group meet the Estonian public and "earn their welcome and support".
Cover image: British, Danish and Estonian NATO personnel line up to take part in NATO Velo, a 1000km cycle across Estonia organised by NATO's enhanced Forward Presence (Picture: NATO.