This dice tower with a castle motif includes a beautiful wrap-around spiral stair case, allowing the dice to bump and roll with randomness as they descend.  The tower's top provides a funnel shape that allows for the dice to be easily dropped in.

This is an easy print, and has been carefully designed so that no supports are required.  The tower is just under 18 cm tall, allowing it to be printed on smaller volume printers as well.