Irish legend says a giant named Finn McCool built the Causeway as a means to hop on over to Scotland. Science says the rock formations are basalt columns. Bring some hiking shoes, you'll need 'em.
Queen's Road, Queen's Island
As well as prime views across Belfast towards the hill that inspired Gulliver's Travels, see the authoritative Titanic story from the spot where it first launched through cool multimedia displays
Old castle surrounded by beautiful flower gardens named "cat gardens" for the many cat shapes scattered about (bushes, tiles, sculptures, etc). Great view of Belfast city as well.
Belfast > Travel & Sightseeing