This is the structure that survives today, supporting the great observation dome.

The two friends hurried to the observation dome atop the hub of the space wheel.

Even an observation dome with the most powerful telescopes could not see through a mountain of sulfur.

The banks were not so high now; from the observation dome he could see over them into the fields beyond.

Then they climbed a steel ladder to the observation dome.

Setting the controls, Tom started up to the observation dome.

How much of a trick is it to clear the observation dome from the top?

Small groups drifted together to the club cars, the lounge or the observation dome.

Charlie hadn't paid first class, but they let him up into the observation dome anyhow; professional courtesy.

The saloon windows gave on the remaining three sides of the world; an observation dome showed everything else.