act out (one's) fantasies

Translations
реализовать (чьи-то) фантазии
She decided to act out her fantasies and travel the world.
Она решила реализовать свои фантазии и отправиться в путешествие по миру.
Definitions
To physically or behaviorally express or perform actions that one has imagined or desired, often those that are unrealistic, forbidden, or not typically acted upon in real life.