National Park Service

Cutaway illustration of hibernating bats roosting in a cave, with a bearded host wiping his boots on a decontamination mat outside a locked gate.

Bats, White-Nose Syndrome, and Why Grand Canyon Caves Stay Shut

A cold-loving fungus that has killed millions of bats nationally was confirmed in Arizona in 2025, and Grand Canyon’s caves are built to keep it out.

Cutaway illustration of Cave of the Domes inside Horseshoe Mesa with a locked gate at the entrance and hibernating bats on the ceiling

Cave of the Domes: the last open cave, and why bats closed it

The one Grand Canyon cave you didn’t need a permit for survived a hantavirus scare but not white-nose syndrome.

Cutaway illustration of a closed, fenced landfill site west of the South Entrance Road with a signpost reading CLOSED and old debris visible beneath a grassy cap

Former South Rim Landfill: from flatcar dumping to a transfer station

A closed South Rim landfill traces back to open dumps and a 1926 railroad-funded incinerator, not a Superfund emergency.

Grand Canyon Source Archive and Bibliography

Every source behind the project, grouped by publisher and linked to the dossiers that cite it.

Cutaway illustration of the fenced Grand Canyon Aviation Operations Area showing a helicopter on a pad, a fuel truck, and a rescuer suspended below a second helicopter on a long rope over canyon terrain

Grand Canyon's Aviation Operations Area and its short-haul rescue crew

A fenced helibase runs one of the busiest non-military federal flight programs, training rescuers who dangle from a rope to reach places helicopters can’t land.

Illustrated cutaway of Grand Canyon Village's cell tower showing signal bars fading to nothing as the canyon rim drops away below it

Grand Canyon's Cellular Coverage: One Carrier, Five Possible Towers

Grand Canyon offered cellular service from just one carrier over a shared 850 Mbps pipe. A 2020 federal plan approved up to five new towers, built permit by permit.

Illustrated cutaway map showing an invisible microwave beam linking two Grand Canyon rim towers across the open canyon air

Grand Canyon's Hidden Microwave Links, From the Rim to Phantom Ranch

Grand Canyon’s towers reach the outside world via line-of-sight microwave links, including a dish at Phantom Ranch that has quietly carried phone calls from the canyon floor for years.

Illustrated cutaway of a Grand Canyon rim communications tower shared by park rangers and several other public safety agencies

Grand Canyon's Shared Interagency Radio and Dispatch Network

How Grand Canyon’s radio system shares towers, dispatch, and rescue response with the Forest Service, BLM, Arizona DPS, a sheriff, a tribal agency, and a neighboring park.

Labeled cutaway illustration of the Grand Canyon showing a spring at the bottom feeding a pipe that climbs to water tanks on both rims, with a bearded man in glasses tracing the route beside his parked lime-green scooter

Grand Canyon's Water System: Sourcing, Treatment, Distribution

How Grand Canyon National Park sources, treats, stores, and delivers water and wastewater across all four rim and inner-canyon developed areas.

Cutaway illustration of a fenced South Rim government compound showing a wildland fire engine bay, fuel tanks, a shuttle bus barn, and a helicopter pad side by side behind chain-link fencing

Grand Canyon's Wildland Fire Base: Inside the Fenced South Rim Compound

A fenced South Rim compound houses the park’s fire base, fuel yard, and shuttle barn — and why it’s closed, from the fire program to Dragon Bravo.