On Saturday and Sunday, the National Park Service will not charge entrance fees at 146 national-park sites where visitors normally pay $3 to $25 for admission.
The Mojave cross, which the US Supreme Court two weeks ago ruled could stay, was removed early this week, sparking outrage.
A lesbian couple and an agnostic couple are suing to prevent the Boy Scouts from using public land. The Supreme Court refused to hear an appeal in the case, which returns to the Ninth Circuit.
Veterans groups say the Mojave cross was no different from other war memorials with religious imagery. Opponents of the Supreme Court decision vow to fight on.
The cross on a desert hilltop in the Mojave National Preserve in California has stood since 1934. Opponents say having the Mojave cross on public land violates the constitutional prohibition on government endorsement of religion.
A white cross has stood in the Mojave National Preserve since 1934. On Wednesday, the Supreme Court will look at issues related to the First Amendment's separation of church and state.
Conservationists worry that a plan for the Mojave desert will upset species’ habitats.