I know the Pinterest cancelled their lease, I forget how much but they had to pay 90M to do it, but they got out of it
You can usually find a public company's leases in SEC fillings. I couldn't find one for Pinterest, but I found Dropbox's 200+ page lease agreement here: https://www.sec.gov/Archives/edgar/data/0001467623/000119312...
(it's a 15 year lease, with the cost increasing from $45 million/year to $68 million/years over the 15 years. Hope there's some option to re-negotiate in there)