The pair are said to be enjoying the wildlife from all the angles, taking in the sights during hot air balloon ride, as well as spending time in a luxurious lodge, reported Ace Showbiz.
The couple reportedly also stayed in amorous Faru-Faru lodges.
Tanzania seems to be one of Biel's favourite tour destinations. In January 2010, the "Valentine's Day" actress climbed Mount Kilimanjaro and reached the 19,341 peak of the mount.
Together with some artists, such as Emile Hirsch, Isabel Lucas, Santigold, Lupe Fiasco, the actress joined the week-long hiking expedition to collect money and raise awareness of the global clean water crisis.
Timberlake and Biel tied the knot on October 19, at Borgo Egnazia resort on Fasano, in the southern Italy.
The wedding celebration was attended by Timbaland, Jimmy Fallon and wife Nancy Juvonen, Andy Samberg, Biel's "7th Heaven" co-star Beverley Mitchell, as well as Timberlake's music manager Johnny Wright and wife Erika.