"Every time Muggles have got anywhere near here all year, they've suddenly remembered urgent appointments and had to dash away...bless them."
     -- Arthur Weasley

Quidditch World Cup map
diagram of the stadium
 

The Ministry of Magic spent a year magically constructing a huge stadium for the Quidditch World Cup in August, 1994. 

• approach through a wood, a twenty-minute walk along a lantern-lit trail
• immense gold walls
• ten cathedrals would fit comfortably inside it
• seats 100,000 people
• Ministry task force of 500 worked on it for a year
• Muggle Repelling Charms on every inch of it
• Top Box provides the prime seats: about 20 purple and gilt chairs
• large parchment tickets
• located on a "nice, deserted moor." (GF6)
• stagger the arrivals: people with cheap tickets had to arrive two weeks early
• a few use Muggle transport to get there, but most use Portkeys or Apparate. 
• two hundred Portkeys around Britain
• suffused with a mysterious golden light which seems to come from the stadium itself
• giant blackboard opposite Top Box which is a score board and also shows advertising
• velvet-covered, tasseled programs