| Name | Address | Event Dates | Events | Resources | ||||
|---|---|---|---|---|---|---|---|---|
| Oranienburg | Germany, Oranienburg | |||||||
| Oulu | Finland, Oulu | |||||||
| Ostróg | Poland, Ostróg | |||||||
| Opera House | United States, Telluride | |||||||
| Ornö | Sweden, Ornö | |||||||
| Oituz | Romania, Oituz | |||||||
| Ostrava | Czech Republic, Ostrava | |||||||
| Opole | Poland, Opole | |||||||
| Oddfellows' Hall | Australia, Wagga Wagga, Fitzmaurice Street | |||||||
| Opera House | United States, Wyoming, Wyoming | |||||||
| Olivenza | Spain, Olivenza | |||||||
| Obârşia | Romania, Obârşia | |||||||
| Odder | Denmark, Odder | |||||||
| Oravice | Slovak Republic, Oravice | |||||||
| Osimo | Italy | |||||||
| Ocna Sibiului | Romania, Ocna Sibiului | |||||||
| Oppdal | Norway, Oppdal | |||||||