He has been arrested many times and held in detention in war-torn nations, but has seen everywhere from St Eustatius to the Savage Islands*. Tiger511
So why does he keep doing it? "It's to meet like-minded people," he tells the BBC.
MTP is an online community that unites extreme travellers. It boasts nearly 30,000 members and exists for people to compare their adventures, in a bid to become "the most travelled person".
But seeing the whole world - as per Most Traveled People - just got harder for Mr Valtari and other extreme travellers.