You will have to use a rift to complete one of Worlds Collide challenges of week 3 in Fortnite. We pulled out all the places where you can find rifts on Season 10 map.
There are relatively few rifts left in Season 10 but the remaining ones are there:
- At the giant burger on the hill east of Pleasant Park
- At the big luminous ball in the center of Loot Lake
- At the large stone statue on the north shore of the frozen lake
- Next to the diligent at the north exit of Paradise Palm
- On the snow-covered island completely south of the map
There you go! Good luck with the rest of your challenges!