So i want to make a game with several biomes, lets say you have a forest, plains and dessert…and you got to a carriage to travel to the other maps. is it possible if so is there a guide to do this? i seen this guide but doesnt go into much and i see some people say you loose your inventory Unreal Engine 4 - Travel between Maps - YouTube
A map is a level. You can load levels as needed.
check the content examples for details and a working project along with level streaming information.