Sources
The data sources WhenRome cites across the site, by category. Every score, ranking, and "according to" reference on the site links back to one of these.
Weather + climate
- Open-Meteo — Live forecasts, archive data, marine, air quality, pollen
- NOAA / National Weather Service — 30-year climate normals, hurricane data
- JMA Japan Meteorological Agency — East Asia climate + typhoon
Earthquakes + seismic
- USGS Earthquake Catalog — Real-time earthquake alerts
Aurora + space weather
- NOAA Space Weather Prediction Center — Live KP index + 3-day forecast
Visa + travel rules
- US State Department Travel — US citizen visa requirements + advisories
- UK FCDO Foreign Travel Advice — UK citizen travel guidance
- Government of Canada Travel — Canadian travel advisories
- Smartraveller (Australia) — Australian citizen advisories
- IATA Travel Centre — Visa rules for all nationality combinations
Emergency + health
- CDC Travel Health — Vaccinations + outbreak alerts
- Country-specific emergency-services pages — Each emergency-number page cites the destination government's source
Power + plugs
- IEC 60083 standard — International plug type standard
- World Standards — Plug + voltage by country
Currency
- European Central Bank — Reference EUR cross-rates
- fawazahmed0/exchange-api — Open-source FX rate aggregator
Tipping + culture
- Lonely Planet country guides — Published cultural-norms section per country
- Local expat-blog consensus — Cross-referenced across multiple sources for each country
LGBT travel
- ILGA-Europe Rainbow Map — Annual LGBT legal-status index for Europe
- Equaldex — Crowdsourced LGBT rights database
- Human Rights Campaign country profiles — Equality-rights advocacy
Solo female travel
- Travel Ladies forum — Solo female traveler community + reviews
- Numbeo Safety Index — Crowdsourced city safety data
Public holidays + calendars
- date-holidays library — Open-source holiday data for 200+ countries
Pet travel
- IATA Live Animals Manual — Airline live-animal transport standards
- Country veterinary import portals — Each pet-travel page cites the destination country's official veterinary import authority
City background
- Wikipedia city + country intros — Quoted snippets attributed
Mapping
- OpenStreetMap + CARTO — Modern basemap tiles
- Esri — Satellite + Atlas basemap tiles
Spot a source we should add?
If you know of an authoritative source we should incorporate — or if you find we've misattributed something — please let us know. We update this list as new sources are added or replaced.