Everything in Yarmouth seems to be on a small scale; small narrow streets nestle against a small castle and harbour, and the ferry terminal is actually built against the castle walls.
Yarmouth is the chief town of 'West Wight', the western part of the Isle of Wight, and forms a very good base for exploring this part of the island.
From a mainland location, the best approach is to use the [http://www.wightlink.co.uk/travel/timetables/lym_yar/index.htm Wightlink car and passenger ferry] which runs every half-hour direct to Yarmouth. This ferry operates from Lymington on the mainland and has good rail and road connections (as described in the Lymington article). Note that taking a car on the ferry can be quite expensive; for short visits it may be better to park in the car park at Lymington Pier and board the ferry as a foot passenger.
Yarmouth is connected to the rest of the Isle of Wight by [http://www.islandbuses.info/ Southern Vectis] service 7. There is also an open top bus that runs from Yarmouth to Alum Bay and The Needles Battery, offering spectacular views.
The town of Yarmouth itself is easily walkable. For nearby areas of West Wight, the Island Explorer (services 7/7A/7B; see 'Get in' above) provides good service. [http://www.svoc.co.uk/ Southern Vectis] also operates open-top bus service 42 throughout the summer, which serves Freshwater Bay, Alum Bay and the Needles on a half-hourly basis.