What country am I? (1)

I share Lake Titicaca with Peru.

I am a Danish territory, an island, and most of my land mass is above the Arctic Circle.

I am the world's second largest country.

I am the birth place of the ancient Olympic games.

I am home to the Serengeti, Mount Kilimanjaro, and the island of Zanzibar.

I am a landmass with no permanent population.

I share a border with the USA, Guatemala and Belize

I am home to the pyramids

I am a kingdom and used to be called Siam.

I am home to the famous cities of Venice, Milan and Florence.

I have 4 official languages: French, German, Italian, Romansch

I am a long, thin South American country with more than 6000 km of coastline.

I am the largest country in Africa and include part of the Sahara desert.

I am a country made of thousands of volcanic islands and home to the Komodo dragon.

I am an Arab, desert country on a peninsula and share a border with Saudi Arabia.