There is a list of the ‘most powerful’ passports which afford the holder visa-free access to the most countries. For now the top prizes are held by Singapore and Germany.
I was intrigued to note that:
As of December 2017, Mauritius, Seychelles, Serbia and Grenada are the only countries whose citizens may travel without a visa to China, Russia and the Schengen Area.
Holding a Mauritius passport allows visa-free access to much of Africa, but not so much of South America. Grenada is the opposite, not surprisingly.
Further, it’s possible to get Grenadian and Serbian passports relatively inexpensively (<1/4 the cost of an average house in Toronto anyway) via investment.
So which two passports would allow access to the most countries visa-free?