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

Revised EU rules approved this week will allow the suspension of visa-free travel based on human rights violations.

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.