The Temple of Hephaestus or Hephaisteion (also "Hephesteum" or "Hephaesteum"; , , and formerly called in error the Theseion or "Theseum"; , ), is a well-preserved Greek temple dedicated to Hephaestus; it remains standing largely intact today.

Hephaestus makes many appearances in popular culture.

a system of troughs and channels in the Amenthes quadrangle of Mars, with a location centered at 21.1 N and 237.5