In the United States, a land office is a government office where records are kept about the sale of public land, including information about who owns it. [US]
Line-ups formed daily at the land offices as township after township was opened for settlement.
Idioms:
do a land-office business [US, old-fashioned]
to be very successful
The Paradiso, one of the capital's newest and most luxurious clubs, was doing a land-office business.