It's a toss up, whether the venue is city or country.
City (this is our typical anniversary date usually done in December)
A long day in NYC just wandering around--Central Park for a walk, maybe stop in the Metropolitan Museum of Art,
Then to one of the fancy hotels for a drink in the lobby, then probably down to Greenwich village or somewhere else downtown for a killer meal.
More wandering, perhaps to fancy bar, etc
(also early on if the date is taking place in December-we'll check out the Windows at Bergdorf Goodman)
Not decided, but either to the mountains or near the seaside.