What's with these sparkly purple lights?

Hint 1 of 4:

Pretty, aren't they?

Hint 2 of 4:

Have you tried stepping into them?

Hint 3 of 4:

You are mapping, aren't you?

Hint 4 of 4:

These 'sparkly purple lights' are teleporters, which take you to some other
location, usually on the same level.