burada/şurada/orada are local adverbs which are the case of locative: Ahmet burada: Ahmet is here. Kitap şurada: The book is just there. Dağ orada: The mountain is there. But bura(sı)/şura(sı)/ora(sı) are noun which are in the case of nominative. So we use them as noun and subject/object. Bura(sı) güzel bir yer(dir): This is a good place. (This place) Şura(sı) bizim köyümüz(dür): This/that (place) is our village. Ora(sı) Ali'nin evi(dir): That (place) is Ali's house. Bura is here. Şura is between here and there. The place must be close, but further than 'here' and closer than 'there'. Ora is there.