It would be kind of interesting if skyscrapers were connected to each other via gondola lifts/aerial trams. However, I don't think this could be retrofitted, si

It would be kind of interesting if skyscrapers were connected to each other via gondola lifts/aerial trams. However, I don't think this could be retrofitted, since likely supporting the cabling and trams was not in the original structural design of most skyscrapers.