The reason? Largely, ourselves. With global tourism hitting record highs - 1.4 billion tourist arrivals in 2018, according to the United Nations World Tourism Organization, up 6% on 2017 - and popular destinations being besieged by over-tourism, world-famous sites are battening down the hatches.

Social psychologist Michael Brein, who styles himself "the travel psychologist," says that it's certainly killed the buzz of certain places - at least for some of us.