Athens has been around for 3,400 years, the birthplace of Democracy and also Socrates, Plato and Aristotle. Greater Athens has a population of 4 million. It was the host city of the first modern Olympics in 1896. Museums and ancient ruins around every corner and millions of tourists and tour buses.
There is a modern metro and you can buy an unlimited weekly ticket for E14 that works on the trains and buses. Lots of organised tours and hop on-off buses as well. English is widely spoken, narrow lanes and crazy traffic and many of the signs are only in Greek so now I know what the saying, “Its all Greek to me” means hahaha.