A 'tour' is a noun and it can refer to a guided journey you make, usually with a tour guide involved, during which you look around a place and learn more about it. The person leading the tour is known as a 'tour guide'.
"You can do a tour by bike. You can do a tour by walking."
"My favourite one is the free walking tour around Melbourne's arcades and laneways."
Have you gone on any tours...
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Learn English: Going on a tour in Australia