Our interests lie in studying and understanding the structure-property relationships in novel ternary intermetallics synthesized by metallic flux-growth methods. This review highlights the synthesis, structures and physical properties of ternary lanthanide - transition metal - main group element intermetallics (Ln - T - X), where T = Co, Rh, Ir, Ni, Pd, and Pt, and X = Ga, In, Sb and Sn. Several phases will be discussed, including Ln_nTIn_3n+2 (n = 1, 2, ∞), CePdGa₆, Ce₂PdGa₁₂, Ce₂PdGa₁₀, LnNiSb₃, LnNi_1-xSb₂ (x ∼ 0.4) and Ln₃Co₄Sn₁₃. In addition, we report the synthesis, structure characterization, and magnetic behavior from single crystals of Ln₃Co₄Sn₁₃ (Ln = Pr, Nd, Sm, Gd, Tb).