Once dominant, US and UK passports have slipped to record lows in global rankings limiting holders' access to destinations.

Just above the Greek passport, Japan and South Korea share the second spot, followed by a 3-way tie between Denmark, Finland, and Ireland.

The Greek passport is among the world's most powerful, ranking 6th and granting holders visa-free access to 189 destinations worldwide.

Greek passport holders enjoy visa-free access to 188 countries and territories worldwide out of a total of 227.