One world observatory 911 tribute center andamp all around town hop on hop off tourr r make the most of your time in nyc with a parcel of bus tours plus a visit to the one world observatory and the 911 memorial tribute centerr r see every side of new york with this package the one world observatory lets you look out from the tallest observation deck in the western hemisphere over the big apple plus discover city pulse the exciting and one of a kind exhibit that responds to gesture techn