Hints and tips:
...In March, for instance, the Smithsonian Institution in Washington DC launched the Aira app which allows blind and partially sighted visitors to engage afresh with their collection in situ....
...The high walls on the north side, with their crenellations and escarpments – clearly visible to us from the track we [my wife Aira and I] were following high above – are cunningly incorporated into the granite...
International Edition