| On Top of the World Designated Place to Oberkirch | 4,757.28 mi (7,656.10 km) |
| On Top of the World Designated Place to Obernburg am Main | 4,770.25 mi (7,676.97 km) |
| On Top of the World Designated Place to Obernkirchen | 4,711.21 mi (7,581.97 km) |
| On Top of the World Designated Place to Oberschleissheim | 4,913.02 mi (7,906.74 km) |
| On Top of the World Designated Place to Oberstdorf | 4,880.17 mi (7,853.88 km) |
| On Top of the World Designated Place to Obertraubling | 4,918.98 mi (7,916.33 km) |
| On Top of the World Designated Place to Obertshausen | 4,751.92 mi (7,647.48 km) |
| On Top of the World Designated Place to Oberursel | 4,737.99 mi (7,625.07 km) |
| On Top of the World Designated Place to Ochsenfurt | 4,813.52 mi (7,746.61 km) |
| On Top of the World Designated Place to Ochsenhausen | 4,848.71 mi (7,803.24 km) |
| On Top of the World Designated Place to Ochtrup | 4,635.54 mi (7,460.18 km) |
| On Top of the World Designated Place to Odenthal | 4,658.49 mi (7,497.11 km) |
| On Top of the World Designated Place to Oelde | 4,682.48 mi (7,535.72 km) |
| On Top of the World Designated Place to Oelsnitz | 4,880.10 mi (7,853.76 km) |
| On Top of the World Designated Place to Oer-Erkenschwick | 4,650.40 mi (7,484.10 km) |
