Pages in a dropdown

Hi, I am hoping someone can help. I am looking to have a dropdown that will have a list of pages and once selected it will go to that page. This dropdown will live on a page or in the sidebar.

Does anyone know of a plugin that can do this?

I am trying to create something like this

See the country dropdown. If anyone knows of a plugin that can do this or any guidance on how this can be done that would be awesome.

Thanks