| Answer | % Correct |
|---|---|
| Oxford | 100%
|
| {Orkney} Islands | 93%
|
| {O2} Arena | 79%
|
| {Old} {Kent} Road | 70%
|
| {Out} Stack | 68%
|
| {Outer} {Hebrides} | 65%
|
| {Old} {Trafford} | 63%
|
| {Old} {Man} of Hoy | 50%
|
| Oban | 46%
|
| {Offa's} Dyke | 46%
|
| Omagh | 38%
|
| {Osborne} House | 34%
|
| Great {Orme} | 27%
|
| {Oulton} Park | 26%
|
| {Oeno} Island | 4%
|