This may sound weird, but there are few things as satisfying as learning how to successfully navigate the mass transit systems of strange cities.
My oldest son has a knack for it. We traveled a lot from Denver to London when British Air opened their terminal. Round trip $399
He immediately knew the tube. We were like moles traveling everywhere under London. Never took a cab except to see Phantom of the Opera. We were too posh for the tube that night.
@chaos440
As do I. So much of our environmental issues would be impacted. The combustion engine is killing us.