Learn German: Ich werde irgendwann spontan nach Italien reisen. - I will travel spontaneously to Italy sometime.

Irgendwann means sometime or at some point. Adding the prefix irgend- to question words like wann (when), wo (where), or wie (how) makes them indefinite. Here, it shows you do not know exactly when this trip will happen, or you simply have not decided yet.

Why are the words ordered as irgendwann spontan nach Italien?

This follows the standard German word order rule often called TeKaMoLo, which stands for Time, Cause, Manner, Place. First comes the time (irgendwann), then the manner (spontan), and finally the place or destination (nach Italien).

Why do we use nach instead of zu for traveling to Italy?

In German, you use the preposition nach when traveling to most cities, countries, or continents because they do not take a definite article (like Italien, Deutschland, or Berlin). If the country had an article, like Switzerland (die Schweiz), you would use in instead.

Could I just use the present tense instead of werde reisen here?