The Mapparium globe, unchanged since 1935, accurately depicts the relative sizes and positions of continents but features outdated political boundaries. Siam and French Indochina are present, while modern nations like Israel and Indonesia are absent. The USSR is prominently displayed, and Africa appears as a large bloc of European colonies.
One of the most intriguing aspects of this exhibit is its unique acoustics. Standing at the sphere's center allows you to hear your voice in immersive 360-degree surround sound. The curved glass walls reflect rather than absorb sound waves, creating a "whispering gallery" effect where whispers from one end of the bridge can be heard clearly at the opposite end. Photography inside is prohibited, and guided tours require paid admission.