Biggest Wall.

The Wall tour ends Saturday.

Roger Waters will bring his tour of Pink Floyd's The Wall to a close on Saturday when he builds and tears down the biggest wall yet at an outdoor event in Quebec City, Canada.

The wall at the Fields of Abraham show will be more than two-times as big as the one that he has built in arenas and stadiums since the tour started in 2010. It will stretch more than 850 feet from end to end, which is the biggest one since his 1990 performance of it in Berlin celebrating the fall of Berlin Wall. The Quebec City show will also include a full surround-sound system guaranteed to "shake the entire site," along with additional lighting and pyrotechnics. Waters says, "This is going to be completely unlike any of The Wall shows we've done anywhere else in the world."

Waters is toying with the idea of taking the tour back to Europe next year and he has every reason to feel encouraged in doing so as it is the highest-grossing tour of the year so far on Billboard's Boxscore Mid-Year Chart, which is based on numbers reported to the magazine for shows between November 1st, 2011 and May 31st of this year. Waters' tour has taken in $131.4 million from 1.2 million in tickets sales. The final tally for the tour is expected to exceed $350 million earned and three-million in attendance.

The second biggest tour at the halfway point is Bruce Springsteen's Wrecking Ball outing, which has taken in $52.3 million in gross ticket sales with just under 600,000 in attendance. Van Halen's tour took in $38.6 million from 373,000 attendees over 33 shows.