Horizons was closed for a variety of reasons. Low ridership was due to the fact that the ride was deemed "seasonal" once GE pulled their sponsorship. It remained in that state for a few years. The odd thing is, neither of these contributed to the ride being removed. TDC feverishly worked at acquiring a new sponsor, but while that was happening, a freak natural occurance caused the ride building to be termed as condemned and that was it. As is common in Florida, a sinkhole developed near (not under as many would think) the service road by the Horizons building. Given that sinkholes are caused by the high water table in Florida coupled with ground shifting and settling, the weight of the building most likely displaced water and saturated the grounds around the building causing the sinkhole. The only solution? Backfill the sinkhole and reinforce the foundation. The problem? The area that needed to be reinforced to stop the spread of the sinkhole was directly under the ride building. I need a citation to this, but I beleive the building was settling into the soft Florida ground about 1.5 inches a year. That's about 1 and a half feet INTO the soft water table. Clearly, the foundations were not set deep enough into the more solid bedrock. BUT- This is the main reason that the ride was closed and the building demo'd. There are plenty of sponsorless attractions that are maintained and still presented, even without a sponsor.