What kind of experience are you looking for?
And which city?
ChangeBeefeater pose
In front of the Tower of London: take a group photo where everyone stands stiffly to attention, hats imaginary, as if you are Beefeaters yourselves.
Big Ben group shot
In front of Big Ben: take a group photo with the team pretending to point at their watches in unison, as if they are late for tea.
Checkpoint: Big Ben
Navigate to Big Ben (Elizabeth Tower) at the Palace of Westminster and check in.
Checkpoint: Buckingham Palace
Navigate to the gates of Buckingham Palace and check in.
Checkpoint: London Eye
Navigate to the London Eye on the South Bank and check in once the wheel is above you.
Checkpoint: Tower of London
Navigate to the Tower of London on the Thames and check in.
Checkpoint: Trafalgar Square
Navigate to Trafalgar Square in front of the National Gallery and check in.
Lion pose
Trafalgar Square has four bronze lions at the base of Nelson's Column. Take a group photo where the team imitates the lions: chin up, paws forward, total dignity.
Local Londoner tip
Convince a real Londoner to share a tip about the city. Take a photo with your impromptu guide.
London Eye perspective
At the London Eye: take a forced-perspective group photo where someone is "holding" or "spinning" the wheel with one hand.
London finale
Final challenge. Find a beautiful London spot (a bridge, a park, a skyline view) and take an amazing group photo.
London kick-off
The hunt begins! Find a typical London backdrop (a red phone box, a black cab, a red bus) and take a group photo with everyone striking a stiff-upper-lip pose.
Mind the gap
Recreate the famous "Mind the Gap" announcement: take a video where someone solemnly says it while the team steps over an imaginary gap.
Pub photo
Find a proper London pub. Order a pint or a soft drink and take a group photo at the bar.
Royal wave
In front of Buckingham Palace: take a group photo where everyone gives the famous slow royal wave (cupped hand, slight tilt).
Spot a "Mind the Gap" sign
On any Underground platform find a yellow MIND THE GAP painted on the platform edge or a sign. Photograph the warning.
Spot a Banksy or street artist
Find a piece of London street art (Banksy original, Stik figure, or any Shoreditch wall). Photograph the work.
Spot a Beefeater
Find a Yeoman Warder (Beefeater) in their red-and-gold uniform at the Tower of London. Photograph the costume from across the cobbles.
Spot a black London cab
Find a classic black Hackney carriage on the road or at a rank. Photograph the rounded silhouette with the FOR HIRE light on if you can.
Spot a black taxi For Hire light
Find a black cab with its yellow FOR HIRE light glowing (meaning you can hail it). Photograph the light against the dark cab.
Spot a blue plaque
Find a round blue plaque on a London building (English Heritage marks the homes of famous past residents). Photograph the plaque close-up.
Spot a Camden punk
Walk into Camden Town and find punk fashion: leather, mohawks, Doc Martens, fishnet, the lot. Photograph the storefront or the look.
Spot a London bus stop
Find a red TfL bus stop with the digital timetable display. Photograph the bus-stop pole and timetable.
Spot a London Christmas wreath / Mayfair facade
In Mayfair or Marylebone, find a Georgian townhouse facade with a flower-box, wreath or ironwork. Photograph the elegant frontage.