most of Slovenia, Croatia, and Serbia, and Bosnia and Herzegovina, Montenegro, Albania, Macedonia, continental Greece (including the Peloponnesus), Bulgaria, European Turkey, and SE Romania
Greece.
Apennine Peninsula, Iberian Peninsula, Balkan Peninsula, Crimean Peninsula, Jultand Peninsula, Scandinavian Peninsula, Peninsula of Brittany. A few small ones: Kerch Peninsula, Attican Peninsula, Thracian Peninsula, Campanian Peninsula, Peloponnesian Peninsula.
Rocks, dirt, trees, etc.
USA
The Italian Peninsula or Apennine Peninsula is one of the three large peninsulas of Southern Europe (the other two are the Iberian Peninsula and Balkan Peninsula), spanning 1,000 km (620 mi) from the Po Valley in the north to the central Mediterranean Sea in the south.
Denmark makes up most of the Jutland peninsula.
Madrid is the capital of Spain.
The five European peninsulas are the Iberian Peninsula (Spain and Portugal), the Italian Peninsula (Italy), the Balkan Peninsula (Greece, Albania, Bulgaria), the Scandinavian Peninsula (Norway and Sweden), and the Jutland Peninsula (Denmark and a small part of Germany).
Denmark makes up most of the Jutland peninsula.
This peninsula is Indochina.
Greece is made up of 3 peninsulas, the Balkan Peninsula, Attica, and Peleponnesus. At least that's what Ancient Greece was made up of.
There is no such thing as the "Baltic Peninsula". If you mean the Balkan Peninsula, it is made up of 11 countries:AlbaniaBosnia & HerzegovinaBulgariaCroatiaGreeceMacedoniaMontenegroRomaniaSerbiaSloveniaand the geographical/political region of European Turkey.