Most countries visited in 24 hours by scheduled transport
Who
Umit Sabanci, Stephen James Finch
What
13 total number
Where
France (Mont-Saint-Martin)
When

The most countries visited in 24 hours by scheduled transport is 13, and was achieved by Umit Sabanci and Stephen James Finch (both UK) from 23 to 24 May 2017.

Umit and Stephen visited Poland, Czech Republic, Slovakia, Hungary, Austria, Switzerland, Germany, Denmark, Sweden, The Netherlands, Luxembourg, Belgium and France within 24 hours.