Wandroz
A traveller booking a room can find out what a hotel is like in thirty seconds, and almost nothing about the four streets around it. Wandroz exists for that gap.
Wandroz maps every official neighbourhood of 25 European cities and says, per neighbourhood, what the evidence supports about safety for a visitor — by day and after dark — with the reasoning and the sources on the page rather than behind a score.
Boundaries are always the city's own official administrative geometry. Ratings come from one of three classes of evidence, and every page says which one it is on: official police or government crime data; a structured local-source assessment where no such dataset is published; or a limited-data assessment where neither is available yet. The methodology page sets out all three, the process behind the second, and the coverage figures city by city, including the unflattering ones.
It is not a crime-prediction tool, it does not estimate anyone's personal risk, and its ratings are never comparable between cities. Where the evidence is thin, the page says so instead of rounding up to a colour.
Wandroz is an independent project, not a company with a newsroom. It is built and maintained by one person, which is the reason for the emphasis on published sources and checkable claims: the work has to stand on what it can show, not on who is saying it.
Map data © OpenStreetMap contributors. Crime data for London from data.police.uk under the Open Government Licence. Neighbourhood boundaries from each city's own open-data portal. Sights resolved against Wikidata and OpenStreetMap. Local sources used for a specific neighbourhood are named on that neighbourhood's page.