How lava became a pattern
On the Hwaam shore of Ulsan, basalt cooled and contracted around 20 million years ago. Cracks formed columns whose cross sections sometimes resemble flowers. This is a place to observe a geological process rather than simply collect another ocean photograph.
Not every column points upward
Many visitors imagine columnar joints as vertical hexagonal towers. At Hwaam, the official tourism description highlights columns in horizontal and other orientations too. Look from a safe viewpoint and compare the different angles; the rock tells a story about cooling and time.
Respect the coast
Ulsan's official attraction detail places the formation around 952-1 Sanha-dong, Buk-gu. It does not establish a guaranteed way down to every rock, nor a fixed visiting schedule. Waves, wind, slippery surfaces and restrictions can change by the day. Do not plan on reaching a particular photo viewpoint without checking conditions.
The experience is most rewarding when you treat the landscape as an outdoor geology lesson and put safety before proximity.