Welcome to Erk Pod episode 539. Erk’s June 2014 Wanderer continues.Erk starts the day with a walking tour of the London Underground. Of course, that also means riding a Tube train and everyone knows how much Erk hates that! An interesting part of the tour is that it is a tour that requires that you have an Oyster card for train travel but there is also some walking in between stations and lines.