The Challs' first headquarters was a house in the mountains (Showcase 7). Later we learn this is Prof's house on the outskirts of Boulder, Colorado (COTU 35). 
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The first appearance of their HQ shows us - a globe. (Showcase 6) |
 |
|
The Challs' first headquarters was a house in the mountains (Showcase 7). Later we learn this is Prof's house on the outskirts of Boulder, Colorado (COTU 35).
|
The first appearance of their HQ shows us - a globe. (Showcase 6) |
|
 An interior shot of the
house (Showcase 11). |
In one of their earliest adventures,
the Challs defeat a mad scientist who hollowed out a mountain
with a fantastic device (COTU 1).  An idea takes root... |
|
The need for a headquarters becomes
acute as radio equipment and maps pile up (COTU
6). This intermediate
headquarters, location unknown, isn't enough. |
 Other times the Challs squeeze
into someone's apartment. Since Ace answers the door when June comes calling, it might be his place. (COTU 8) |
 Here's another view of Rocky's
"penthouse home" bought with his prize money. The location
is unspecified. But it includes an original Matisse painting!
(Adventure 496) |
