Visit Claremont Square, rumored to encourage 12 Grimmauld Place
https://www.scribd.com/document/997781947/Harry-Potter-London-Souvenir-Hunt-Budget-vs-Premium-Picks-145002
Visit Claremont Square, rumored to inspire 12 Grimmauld Place, and have fun with the moody Georgian terraces that in good shape the saga.