On top of Dewey Hill, in Grand Haven, Michigan, there’s a giant hydraulic cross that goes up several times a year:
The cross came into being in the early 1960s as a gift to the city (and it quickly became the centerpiece for a giant nativity scene). The city pays for the cross’ upkeep now by adding its maintenance costs to the contracts of any group that rents nearby Waterfront Stadium.
In other words, if you want to rent the public facility, you’re paying for the preservation of a Christian cross.
City officials maintain that it’s not just a Christian symbol. For example, during the annual Coast Guard Festival, they “dress up” the cross like an anchor.