| Uniqueness | Member State | Extra info |
| ...that lies for more than 25% below sea level? | |
| ...that joined the EEC (EU-predecessor) in 1981? | |
| ...to have territory on the African mainland? | |
| ...to completely surround two countries? | |
| ...through which the 70th parallel north runs? | |
| ...that is a Grand Duchy? | |
| ...that is not recognized by an EU candidate member state? | |
| ...with a musical instrument in its coat of arms? | |
| ...that borders Liechtenstein? | |
| ...that has speed limits in miles per hour? | |
| ...to have a lake more than 5000 km² in area? | |
| ...with no point more than 250m above sea level? | |
| ...that has EU-territory in the UTC-1 time zone? | |
| ...with an annual per capita beer consumption over 150 liters? | |