An Instagram post by His Highness Sheikh Hamdan bin Mohammed bin Rashid Al Maktoum, Crown Prince of Dubai, received more than 1,000 likes per minute on Monday night after it showed him riding the London Underground.
One of the iconic features of the British capital, it is used by millions of people every single day. And it can now add the Crown Prince and his father, His Highness Sheikh Mohammed bin Rashid Al Maktoum, Vice President and Prime Minister of the UAE, and Ruler of Dubai to that list.
While it is not entirely evident which line the Royal family were taking, the red poles suggest it is the Central Line, which runs all the way from West Ruislip in the west to Epping in the east (that being the longest single journey one can take without change; a total of 34.1 miles). It passes through the likes of St Paul's, Tottenham Court Road, Bank, Oxford Circus, Marble Arch and Notting Hill Gate.
Made up of 250 miles of train tracks and spread right across Greater London, it is the 11th largest public transport network in the world.
Sheikh Hamdan, who studied at the London School of Economics in Central London is likely familiar with the network, and is seen smiling in the images, and in similar footage on Snapchat.
Instagram user @isabelle_badulet commented: "You are a great exemple [sic] to the world's leaders. Each and everyone shall follow you."
And user @downtownmomnyc wrote: "Very very cool."
We're inclined to agree with both.
TEN FACTS ABOUT THE LONDON UNDERGROUND
1. The average speed on the Underground is 20.5 miles per hour, including station stops.
2. The busiest Tube station is Oxford Circus.
3. The tunnels beneath the City of London curve in the way they do because they follow its medieval street plan.
4. There are a total number of 167 lifts in daily use on the Underground.
5. Only Beijing Subway and the Shanghai Metro are believed to be larger than the London Underground.
6. Only 45 per cent of the service is actually 'underground'.
7. Hampstead station is 58.5 metres below ground, the deepest of any station.
8.The iconic logo is known as 'the roundel'
9. A Tube train travels an average of 114,500 miles each year.
10. Just 10 per cent of the whole network is south of the River Thames.
For 140 more cool and quirky facts, check out The Daily Telegraph