https://www.youtube.com/watch?v=UdvYcWxycgY
Finland and Estonia are planning to construct a 15 billion dollar tunnel across the Gulf of Finland, connecting the capital cities of Helsinki and Tallinn. A Helsinki-Tallinn tunnel would transform the economies of the region, creating a twin city metropolitan area and improving connectivity between Finland and the rest of Europe. https://www.youtube.com/watch?v=hvpNG1FBXss
