Borussia Dortmund

Today we visited Dortmund for a football match.  The stadium was HUGE and what a great, friendly atmosphere.  I've never seen so many people, and the stand behind the goal (on the right of the photo) holds over 20,000 fans.  It was amazing to hear them all singing and bouncing up and down in unison!  Good game and Dortmund won 2-0.
Wikipeida information about the stadium:
Westfalenstadion is a football stadium in Dortmund, Germany, which is the home of Borussia Dortmund, now called Signal Iduna Park for sponsorship reasons.
The stadium is one of the most famous football grounds in Europe and is renowned for its atmosphere.  It has a league capacity of 81,365 (standing and seated) and an international capacity of 65,829 (seated only).  It is Germany's largest stadium, the seventh-largest in Europe, and the third-largest home to a top-flight European club after Camp Nou and the Santiago Bernabeu Stadium. It holds the European record for average fan attendance, set in the 2011–2012 season with almost 1.37 million spectators over 17 games at an average of 80,588 per game.  Sales of annual season tickets amounted to 55,000 in 2015.
The 24,454 capacity Südtribüne (South Bank) is the largest terrace for standing spectators in European football.   Famous for the intense atmosphere it breeds, the south terrace has been nicknamed the "Yellow Wall".  The Borusseum, the museum of Borussia Dortmund, is near the stadium.
The stadium hosted matches in the 1974 and 2006 FIFA world cups. It also hosted the 2001 UEFA cup final. Various national friendlies and qualification matches for World and European tournaments have been played there as well as matches in European club competitions.