Worth seeing? yes; but not worth going to see.
Notes from Wikiquote
On the Giant's Causeway. A similar opinion was expressed by the English traveller Richard Twiss in 1775 in A Tour of Ireland, p. 157
When a man is tired of London, he is tired of life; for there is in London all that life can afford.
Quote text and notes from Wikiquote: Samuel Johnson (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.