I plan to go sightseeing in Paris next year.

Literal

Next-year Paris sightseeing [object-を] do [intention-つもり] is.

見物 ('sightseeing / viewing') is a noun that takes する to become a verb 'to sightsee.' パリ見物 forms an N+N compound 'Paris sightseeing.' The ~つもりです structure marks personal intention.