Trans World Dome
Home of: The St. Louis Rams (NFL)
Cost of naming rights: $1.3 million a year
It's never a good sign when your stadium's sponsor is bankrupt before the stadium even opens.
Trans World Airlines played a huge role in helping lure the Rams to St. Louis from Los Angeles, but years of bad contracts and unsustainable discounts were taking their toll. When the Rams arrived in 1995, TWA was already in and out of bankruptcy.
By the time the Rams won the Super Bowl in 2000, TWA was already a shell of its former self. It merged with American Airlines (AMR) in 2001 and its name disappeared from the stadium soon after. American didn't pick up the rights, but maybe that wasn't such a bad thing ...