Sources & attributions

Data

• Wikidata — country facts, CC0 1.0.
• CIA World Factbook (final edition, via factbook.json) — public domain (US Government work); used for cross-checks.
• World Bank World Development Indicators — CC BY 4.0; population & surface area cross-checks.
• Natural Earth — map geometry, continents & regions, public domain.
• flag-icons by Panayiotis Lipiridis — flag artwork, MIT License.

How each field is checked

• identity: Wikidata (CC0) – ISO codes & labels
• continent: Natural Earth (public domain), checked against Wikidata P30 (CC0)
• capital: Wikidata P36 (CC0), checked against CIA World Factbook (public domain)
• population: Best agreeing pair of World Bank WDI SP.POP.TOTL (CC BY 4.0) / Wikidata P1082 (CC0) / CIA World Factbook (public domain), within 10%
• area: Wikidata P2046 (CC0) checked against CIA World Factbook or World Bank AG.SRF.TOTL.K2, within 3%
• highpoint: Wikidata P610/P2044 (CC0) checked against CIA World Factbook, within 30 m
• neighbors: Land borders listed by both Wikidata P47 and CIA World Factbook
• languages: Wikidata P37 official languages (single source – clue only)
• currency: Wikidata P38/P498, ISO code confirmed in CIA World Factbook exchange-rate entry
• flags: flag-icons (MIT) by Panayiotis Lipiridis
• map: Natural Earth 1:50m Admin 0 (public domain)

Photos (37)

All photos are from Wikimedia Commons under the licences shown. Changes: resized and converted to WebP for faster loading; no other edits.

• Great Wall of China (China) — CEphoto, Uwe Aranas — CC BY-SA 3.0 — source
• Taj Mahal (India) — Yann; edited by Jim Carter — CC BY-SA 4.0 — source
• Statue of Liberty (United States) — Christian David — CC BY-SA 4.0 — source
• Hagia Sophia (Turkey) — Arild Vågen — CC BY-SA 3.0 — source
• Machu Picchu (Peru) — Martin St-Amant (S23678) — CC BY-SA 3.0 — source
• Colosseum (Italy) — FeaturedPics — CC BY-SA 4.0 — source
• Stonehenge (United Kingdom) — Stefan Kühn — CC BY-SA 3.0 — source
• Petra (Jordan) — Diego Delso — CC BY-SA 3.0 — source
• Chichen Itza (Mexico) — Daniel Schwen — CC BY-SA 4.0 — source
• Sydney Opera House (Australia) — W. Bulach — CC BY-SA 4.0 — source
• Borobudur Temple (Indonesia) — Gunawan Kartapranata — Public domain — source
• Acropolis of Athens (Greece) — A.Savin — CC BY-SA 3.0 — source
• Le Mont Saint-Michel (France) — Diliff — Public domain — source
• Alhambra (Spain) — Jebulon — CC0 — source
• Neuschwanstein Castle (Germany) — Wilfredor — CC0 — source
• Giza pyramid complex (Egypt) — KennyOMG — CC BY-SA 4.0 — source
• Luang Prabang (Laos) — Shelly Zohar — CC BY-SA 4.0 — source
• Hallstatt (Austria) — C.Stadler/Bwag — CC BY-SA 4.0 — source
• Kotor (Montenegro) — User:Ggia — CC BY-SA 3.0 — source
• Bagan (Myanmar) — Vyacheslav Argenberg — CC BY 4.0 — source
• moai (Chile) — Rivi — CC BY-SA 3.0 — source
• Himeji Castle (Japan) — _steffen — CC BY-SA 2.0 — source
• Tikal (Guatemala) — Mundo Maya — CC BY-SA 4.0 — source
• Table Mountain (South Africa) — Danie van der Merwe from Cape Town, South Africa — CC BY 2.0 — source
• Banff National Park (Canada) — Gorgo — Public domain — source
• Plitvice Lakes National Park (Croatia) — Pablo BM from London, England — CC BY 2.0 — source
• Prague Castle (Czech Republic) — Diego Delso — CC BY-SA 4.0 — source
• Great Mosque of Djenné (Mali) — Andy Gilham — CC BY-SA 3.0 — source
• Registan (Uzbekistan) — Bernard Gagnon — CC0 — source
• Wieliczka Salt Mine (Poland) — C messier — CC BY-SA 4.0 — source
• Bryggen (Norway) — Unknown (see file page) — CC BY-SA 2.5 — source
• Ayutthaya Historical Park (Thailand) — Vyacheslav Argenberg — CC BY 4.0 — source
• Lake Malawi National Park (Malawi) — Joachim Huber from Switzerland — CC BY-SA 2.0 — source
• Old Havana (Cuba) — Gabriel Rodríguez — CC BY-SA 2.0 — source
• Monolithic churches in Lalibela (Ethiopia) — Sailko — CC BY 3.0 — source
• Rice Terraces of the Philippine Cordilleras (Philippines) — Cid Jacobo — CC BY-SA 3.0 — source
• Basantapur Durbar Square (Nepal) — Gerd Eichmann — CC BY-SA 4.0 — source