  We study soliton solutions to the Klein-Gordon equation via Lie symmetries
and the travelling-wave ansatz. It is shown, by taking a linear combination of
the spatial and temporal Lie point symmetries, that soliton solutions naturally
exist, and the resulting field lies in the complex plane. We normalize the
field over a finite spatial interval, and thereafter, specify one of the
integration constants in terms of the other. Solutions to a specific type of
nonlinear Klein-Gordon equation are studied via the sine-cosine method, and a
real soliton wave is obtained. Lastly, the multiplier method is used to
construct conservation laws for this particular nonlinear Klein-Gordon equation
in (3 + 1)-dimensions.
