A typical feature of limestone areas is the prominence of cockpits, sinkholes, caves and underground passages. St. Ann has a number of caves and sinkholes including Bat Cave near Chesterfield, Mount Plenty Cave, Dairy Cave. Green Grotto Caves are perhaps the most popular caves in St. Ann. The Dry Harbour Caves, on the border of St. Ann and St. Mary, were much visited in former times. St. Ann is home to some 54 other caves
The most well known sinkholes are the Light Hole sinkholes, which are possibly connected to deep inaccessible caves. Galina Point, just outside of Oracabessa, offers a good view of a long series of caves.
Derived from bat droppings that accumulate in the caves, phosphate is the only fertilizer mineral mined in Jamaica. It is extensively mined in this parish.
Methane gas seepage has been located in the Windsor area of St. Ann but no major gas source has been found.
St. Ann has two of the many saltwater lagoons characteristic of the Jamaican coastline. These are the Mystery Lake and the Green Grotto.
St. Ann has its fair share of mountains including the Dry Harbour Mountain, Mount Alba, Irons Mountain, Murray Mountain, Mount Diablo and Mount Zion. Additionally, there are several other areas of highland: Grate Hill, Zion Hill, Blowfire Hill, Union Hill.