Explorer answers · Sep 16, 2026. All finished weeks




Visual clue. All four show underground platforms with columns, signage, and a metro train in a tiled hall.
The hook. They depict stations of the Minsk Metro system in Belarus.
Here's the trap we set. None—this is the clear visual set to get you started.




Visual clue. Each stamp shows a train plus a ship and an airplane in one scene or montage.
The hook. They celebrate multiple modes of transport—rail, sea, and air—on a single design.
Here's the trap we set. You may also notice another Queen Elizabeth II stamp with the same trio—don’t be fooled! One of the QEII designs actually belongs with the portrait + train group.




Visual clue. All four show sleek, non-steam trains with diesel styling and modern liveries.
The hook. They depict diesel-powered passenger units rather than steam locomotives or pure electric sets.
Here's the trap we set. It’s tempting to lump these with any modern-looking trains (including electrics like high-speed sets), but these four are specifically diesel units.




Visual clue. Each design features a person’s portrait alongside a train.
The hook. They combine a notable figure’s likeness with a railway scene on the same stamp.
Here's the trap we set. A Queen Elizabeth II stamp also appears among the multimodal transport designs—splitting the portraits creates the deliberate red herring.