This picture, taken from the command module America, shows Apollo 17's lunar module Challenger's ascent stage in lunar orbit. Small reaction control thrusters are at the sides of the moonship with the bell of the ascent rocket engine itself underneath. The hatch allowing access to the lunar surface is visible in the front and a round radar antenna appears at the top.
The next generation of super heavy-lift launch vehicle is the privately developed SpaceX Falcon Heavy. Although NASA's Saturn V moon rocket could lift about two and a half times as much mass, the Falcon Heavy would still be the most powerful U.S. rocket to be launched since the Saturns were retired in 1972. [See it here.]