As Kanwisch has stated, all of mainland Europe, including Scandinavia, is LHD (same as you guys). Great Britain and the Republic of Ireland are all RHD but, as you have to either get a ferry or car train to get here, there is no having to swap lanes at the border etc. Most of Europe is now part of the European Union (EU), which is kind of like the USA but with lots of countries instead of states and different languages in each one. This means that there are no border crossings/guards/machine guns/big dogs etc. now between any of the member nations. The EU has been very good at standardising most road signs and markings, even the driving licences across the EU have been standardised. The only difference being the individual countries have them printed in their relevant language.
So, if you're thinking of a trip to Europe you only get your passport stamped at point of entry into the EU, not each individual country as used to be the case.
Hope my rambling helped answer your question.