Canada is a sovereign state in the northern part of North America. Canada's long and complex relationship with the United States has had a significant impact on its economy and culture. It is one of the world's most ethnically diverse and multicultural nations, the product of large-scale immigration from many countries. Its advanced economy is the eleventh largest in the world, relying chiefly upon its abundant natural resources and well-developed international trade networks. It is rich of natural resources, home to 41 national parks and hundreds of provincial parks. It ranks among the highest in international measurements of government transparency, civil liberties, quality of life, economic freedom, and education. 

Tahiti is the largest island in French Polynesia, the South Pacific archipelago. This overseas collectivity of the French Republic is sometimes referred to as an overseas country. The island was formed from volcanic activity and is high and mountainous with surrounding coral reefs.  Tahiti was originally settled by Polynesians between 300 and 800 CE. They represent about 70% of the island's population with the rest made up of Europeans, Chinese and those of mixed heritage. The island was part of the Kingdom of Tahiti until its annexation by France in 1880, when it was proclaimed a colony of France. It was not until 1946 that the indigenous Tahitians were legally authorised to be French citizens. French is the only official language although the Tahitian language (Reo Tahiti) is widely spoken.

Costa Rica is a small, rugged, rainforested Central American country with coastlines on the Caribbean and Pacific. Since the late 1980's Costa Rica became a popular nature travel destination, and its main competitive advantage is its well-established system of national parks and protected areas and home to a rich variety of flora and fauna. Costa Rica is also known for its beaches, volcanoes, immense biodiversity and progressive environmental policies, being the only country to meet all five criteria established to measure environmental sustainability.

Alaska is a U.S. state situated in the northwest extremity of the Americas. With landscapes that stretch out seemingly to infinity, it is known for its dramatic, diverse terrain of wide-open spaces, mountains and forests, with abundant wildlife and many small towns.  Alaska was viewed as a frozen wasteland, not realizing it would turn out to be one of the United States' richest resources for gold and oil. It took until 1959 for the territory to become a State of the Union. For lovers of nature, few places exhilarate like Alaska!