It's fine to write Veronica traveled all over the world and omit any specific, completed time reference. In this case, you are making a statement about Veronica today (the kind of person she is, her experience and qualities, etc).
Finally, the Present Perfect can be used -ing forms, infinitives or subordinate clauses to clarify an ambiguous sequence in time For instance, the word when can mean either "at the same time" or "after." The use of Present Perfect resolves the meaning.
Right: She WILL PAY you when you ASK her (No Present Perfect)
She will pay you at the same time as you ask her, or maybe just after.
Right: She WILL PAY you when you HAVE TAKEN out the garbage (Present Perfect)
= She will pay you clearly after you take out the garbage and have proven it!
(原句哪里表示"的确如此"呀。是不是have taken 在这里同时表示了两个意思：1 take 这个动作在pay 这个动作之前，2，take这个动作已经发生过了？)