| On Top of the World Designated Place to Oerlinghausen | 4,700.18 mi (7,564.21 km) |
| On Top of the World Designated Place to Oestrich-Winkel | 4,718.79 mi (7,594.16 km) |
| On Top of the World Designated Place to Offenburg | 4,752.45 mi (7,648.33 km) |
| On Top of the World Designated Place to Oftersheim | 4,758.34 mi (7,657.80 km) |
| On Top of the World Designated Place to Ohrdruf | 4,811.17 mi (7,742.84 km) |
| On Top of the World Designated Place to Ohringen | 4,801.08 mi (7,726.59 km) |
| On Top of the World Designated Place to Olbernhau | 4,920.54 mi (7,918.85 km) |
| On Top of the World Designated Place to Olching | 4,903.75 mi (7,891.82 km) |
| On Top of the World Designated Place to Oldenburg | 4,655.45 mi (7,492.22 km) |
| On Top of the World Designated Place to Oldenburg in Holstein | 4,731.52 mi (7,614.65 km) |
| On Top of the World Designated Place to Olfen | 4,654.12 mi (7,490.09 km) |
| On Top of the World Designated Place to Olpe | 4,688.29 mi (7,545.07 km) |
| On Top of the World Designated Place to Olsberg | 4,707.11 mi (7,575.36 km) |
| On Top of the World Designated Place to Oranienburg | 4,860.53 mi (7,822.27 km) |
| On Top of the World Designated Place to Ortenberg | 4,754.14 mi (7,651.05 km) |
