During reconstruction, the moat was expanded and additional towers were added.

An additional tower, with 291 more rooms, was constructed in 1972.

In the 1930s, two additional 300-foot towers were added to increase the range of the station's signal.

There was a widespread belief that the abbey had two additional, smaller towers at the west end.

In 1976 two additional towers were constructed, and the station began broadcasting around the clock.

Six additional towers are lined along the rectangular shaped facility.

An additional tower was also added at the station's transmitter site.

Sometimes there are additional towers on the transept ends.

New Bloons were also added, as well as additional towers, and player options.

In some cases, the terrain makes it possible so there is no need for an additional tower and these are known as ground cabs.