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While some high-rises skip the allegedly unlucky floor, many buildings aren't so superstitious. The Empire State Building, one of the most famous buildings in the world, has a 13th floor. And, according to its official site, the whole thing is available to lease. 

Fairmont hotels in Acapulco, Quebec City, and Vancouver don't have a 13th floor. Interestingly, Fairmont hotels in other cities do. The decisions regarding whether or not a building has a 13th floor usually rest with the building contractor and if they are catering to the publics fear of the number 13th. 

The fear of Friday the 13th stems from two separate fears -- the fear of the number 13 and the fear of Fridays. Both fears have deep roots in Western culture, most notably in Christian theology. Thirteen is significant to Christians because it is the number of people who were present at the Last Supper (Jesus and his 12 apostles). Judas, the apostle who betrayed Jesus, was the 13th member of the party to arrive.