Mexico – United States
Haiti – Dominican Republic
Belgium – The Netherlands
Norway – Sweden

North Korea – South Korea
Venezuela – Brazil – Guyana, Mount Roraima
Brazil – Argentina
Slovakia – Austria – Hungary

Poland-Ukraine
Bolivia And Brazil
China – Nepal (Mount Everest)
Denmark And Sweden
Namibia, Zambia, Zimbabwe and Botswana – the world’s only quadripoint
Turkey – Armenia
Former East-West Germany
India – Pakistan

Image via NASA.
Image via Quora