Sinkholes

One would expect Costa Rica to be plagued by sinkholes because of the amount of seismic activity it experiences but sinkholes in Costa Rica are not a common sight.  The last major one opened up in 2012 due to continuous storms, and it took about three weeks to patch up the 3.5m(l) x 4m(d) hole.

Small sink holes tend to happen only when the country has experienced heavy rainfall or high  magnitude earthquakes occur.

Sources:
Sott.net