At the Austria Pavilion, you walk through a forest and breathe fresh air, that's because trees produces the oxygen we needs to live, and we exhale carbon dioxide that the trees needs to survive, so we are dependent on each other, if we wipe out the rain forest, then that will be the end of the human race.
It's only an hour flight, Cuban visa can be bought during check-in at the airline counter before departure, just don't forget your passport. I exchanged dollars into their convertible (CUC) pesos upon arrival. I stayed at an hostel next to the baseball stadium. I focused on videotaping their culture alone rather than being somewhat biased traveling group with their hectic schedule. One day took a Soviet era Lada taxi to outskirts of Havana to visit a Deaf school. They asked me what we Deaf Americans do with our obsolete TTY as we are using VP nowadays, hopefully some organizations will donate those equipment. I felt like was blasted into the past, surrounded by all those vintage automobiles.