City bingo challenges

Spot an obwarzanek pretzel ring

Find an obwarzanek (Krakow ring-shaped bread) at a street cart on Rynek Główny. The poppy-seed or sesame ring. Photograph one.

Spot an olive tree

Find an olive tree in a square, park or courtyard (or in a planter outside a shop). Photograph the silvery leaves.

Spot an Oranje (royal) flag

Find an orange pennant or Oranje flag (Royal House decoration, especially around Koningsdag in April). Photograph the orange.

Spot an Oslo T-bane sign

Find the white T on blue at any Oslo Metro entrance. Photograph the sign.

Spot an SF Giants or Warriors kit

Find a Giants (orange-and-black) or Warriors (blue-and-gold) jersey. Photograph the kit.

Spot an SF rainbow crosswalk

Walk to the Castro and find the rainbow crosswalks at 18th and Castro. Photograph the painted street.

Spot an SF Victorian bay window

Find a typical SF Victorian house with a bay window on Pacific Heights or the Haight. Photograph the bay.

Spot an SPQR plaque

Find an SPQR plaque (Senatus Populusque Romanus) on a public fountain, manhole cover, lamp post or bin. Rome uses it as its modern logo too. Photograph the letters.

Spot Arthur's Seat silhouette

Find a view of Arthur's Seat (the extinct volcano east of the city). Photograph the green hump from the city below or from on top of it.

Spot Baldwin Street steepness

Drive to Baldwin Street in North East Valley. Photograph the steep slope (or yourself looking down).

Spot Belgian fries in a cone

Find a paper cone of frites with mayonnaise (or andalouse, samurai, ketchup), Belgium's national snack. Photograph the cone with a dollop of sauce on top.

Spot Berlin Pilsner branding

Find a Berliner Pilsner glass, coaster or umbrella outside a Kneipe. Photograph the blue-and-white logo.

Spot Berlin street art

Different from a tag, find a piece of street art with a recognisable figure (a Blu mural, a Banksy-like stencil, a wheatpaste). Photograph it.

Spot Big Ben

Find a clear view of the Elizabeth Tower with the Big Ben clock face. Photograph it from Parliament Square, Westminster Bridge or the South Bank.

Spot bitterballen

Find a plate of bitterballen on a café table or in a snack-bar display, the crispy breaded meatballs that arrive with mustard. Photograph the lineup of golden balls.

Spot BMW Welt curves

Find a view of BMW Welt or the BMW Tower (the four cylinders). Photograph the steel curves.

Spot brown cheese (brunost)

Find brunost (caramelised brown goat cheese) in a deli window, on a breakfast tray or as the block on a special slicer. Photograph the brown brick.

Spot Buckingham Fountain

Walk to Grant Park and find Buckingham Fountain with the central jet. Photograph the spray.

Spot Buda Castle

Find Buda Castle (Budavári Palota) on Castle Hill. Photograph the long Baroque facade with the green dome.

Spot Calton Hill skyline

Walk up Calton Hill and find the views over Edinburgh with the National Monument (the unfinished Parthenon) on top. Photograph the panorama.

Spot canal-house cornice letters

Find a canal house with letters or numbers carved or painted on the gable, year of build or owner's initials. Photograph the typography.

Spot Castello Sforzesco brick

Find the Castello Sforzesco, the red-brick Renaissance castle. Photograph the towers or the Filarete entrance.

Spot Castle Square at night with lights

Walk to Castle Square after dark and photograph the lit-up column and royal castle facade in the evening light.

Spot Charles Bridge

Walk onto Charles Bridge over the Vltava and photograph the long span with its statues, the towers at either end visible.