As one of Ramsay Snow's sadistic torments of the captive Theon Greyjoy, before Theon knew his real identity, he pretended to be a spy sent by his sister Yara to help him escape. When Theon asked who he was, he claimed he was an ironborn from Saltcliffe.
In the books
In the A Song of Ice and Fire novels, Saltcliffe is the least noteworthy of any of the seven Iron Islands, without much of a distinguishing economy, culture, or history.
The Iron Islands