16th level modules... help?

[coyote6]

WotC's website also has "The Haunting Lodge", a short PDF adventure that's listed as being for 17th level characters. I just skimmed through it, and it might actually work without much change for 16th level characters.

 

[Joshua Randall]

If your party is into dragon-slaying, they might enjoy Icy Heart from the WotC Free Original Adventures. There isn't a suggested party level listed ("an adventure for four high-level player characters" it says), but the dragon is pretty gnarly:

Krikk, female advanced old white dragon/Dru 10: CR 24