https://www.hklaw.com/en/insights/publications/2020/10/unite...
https://home.treasury.gov/policy-issues/financial-sanctions/...
"WARNING: TOUR PACKAGES FOR SCUBA DIVING, BICYCLING, HUNTING, FISHING, HIKING OR OTHER TOURIST TRAVEL IN CUBA ARE ILLEGAL"
https://home.treasury.gov/system/files/126/cubatrav.pdf (from the previous page)