What is an example of a wormhole?

Could you please elaborate on the concept of a wormhole? Could you provide an illustrative example to help me visualize this theoretical phenomenon? I'm particularly interested in understanding how a wormhole might function in the context of physics or cosmology. Could you describe a hypothetical scenario where a wormhole might exist and explain its potential role in connecting two distant regions of spacetime? I'm keen to learn more about this fascinating topic.