The Atlantic has been crossed in boats of 30 foot length and shorter.
Not a vista but you need a visa to travel to most of Europe from most of Africa.
we need a large intestine to travel to the rectum and the to the anus!
South Africa is geographically East-South-Easterly from the USA.
A car.
That would depend on where you are travelling from and your nationality. If you are arriving from mainland Europe you will need a Passport to enter. Anyone leaving the Country and returning needs a Passport.
If you are already in Russia, Europe or many of the Asian countries, you can get to Siberia by train or plane. Otherwise, you would need to travel to a city with an International Airport or Port and then a train or internal flight. Siberia is a big place.
As far as travel to Europe there are no health restrictions from the USA to Europe. They do want you to have medical insurance or medical travel insurance. The medical in most of Europe is modern and comparable to USA. If you are taking a pet, dog or cat, they must be certified by a Veterinarian.
Southern Europe, specifically Italy.
You would travel south, regardless of where on the equator you began your journey.
To find more information about touring Europe as a senior, go to your local travel agency and speak to a travel agent. They will find the information that you need and give you a quote.
Europe
Yes, you would need a visa to travel to Cayman Island.