A crater on Mars

Betrayal at Krondor

Bąk, a town in the Pomeranian Voivodeship in Poland

Columbus Municipal Airport (Indiana) (FAA airport code: BAK) in Columbus, Indiana, United States.

Bashkir language (ISO 639 identifier: bak)

Bak, a common Korean family name.

Heydar Aliyev Airport (IATA airport code: BAK) in Baku, Azerbaijan.

Per Bak, Danish physicist.

Biking Across Kansas

Aad Bak, Dutch football player.

Bak, the abbreviation for the orchid genus Bakerara

Bcl-2 homologous antagonist killer, a protein involved in apoptosis.

Bak District, Afghanistan

Bak, Hungary, a village in Hungary

A pro-apoptotic protein, Bcl-2 homologous antagonist killer.