US President Barack Obama ended his high-pressured stint in the UK for the Nato summit by enjoying a spot of sightseeing at Stonehenge.
Onlookers were shocked when they the spotted the world leader at the ancient monument in Wiltshire.
His visit came on the final day of the Nato summit in south Wales, where the advance of Isis, and the crisis in Ukraine were high on the agenda.
Mr Obama told reporters that seeing Stonehenge was on his "bucket list" of things to do.
Heather Sebire, English Heritage's Stonehenge curator, gave the President a tour of the site.
She said: “Mr Obama was fascinated by the story of the stones, what we know about them and the mysteries that have yet to be solved.
"He asked lots of questions about how old the monument is, how long it took to build it, and what was its purpose.
"He described the atmosphere around the stones as 'really special' and his visit to Stonehenge as 'a highlight of my tour'.
"He particularly loved seeing the colour and texture of the stones. It was a beautiful still evening and it was a privilege to show the US president around this unique monument which continues to inspire and intrigue people.”
He was met at the monument by English Heritage's Stonehenge manager Kate Davies
She said: “We were honoured to welcome US President Barack Obama to Stonehenge.
"His office told us the President was very interested to see the iconic monument for himself. Every day people from all over the world make the trip to the ancient stones but this visit was a particularly special one."
Janice Raffle was similarly excited by the high-profile visitor.
She wrote on Twitter: "I can see president Obama! Any messages?"
After posting a picture apparently showing the President at the site, she added: “He waved to us!!”
But not everyone was as enthused.
Motorist Andrew Turner tweeted: "So Obama wrecked my a303 journey today, then I see him up close to Stonehenge."
Additional reporting by APReuse content