Here are notable cities worldwide beginning with **R**, spanning continents and cultures:
| City | Country | Notable For |
|---|---|---|
| Rome | Italy | Capital, ancient ruins, Vatican, 2.8M metro |
| Rio de Janeiro | Brazil | Christ the Redeemer, Carnival, beaches, 13M metro |
| Riyadh | Saudi Arabia | Capital, financial hub, 7.7M metro |
| Rotterdam | Netherlands | Europe's largest port, modern architecture, 2.5M metro |
| Yangon (Rangoon) | Myanmar | Former capital, Shwedagon Pagoda, 5.5M metro |
| Riga | Latvia | Capital, Art Nouveau, Hanseatic history, 0.6M metro |
| Reykjavík | Iceland | Capital, northernmost, geothermal, 0.2M metro |
| Raipur | India | Chhattisgarh capital, steel, 1.5M metro |
| Rabat | Morocco | Capital, Atlantic coast, UNESCO medina, 1.9M metro |
| Rochester | USA (NY) | Kodak/Xerox legacy, optics, universities, 1.0M metro |
From ancient capitals to modern megacities, 'R' cities span the globe.