More than $262 million will be allocated to boost the upkeep of national parks in the upcoming federal budget.
The funding is expected to create 110 extra jobs to address feral animals and weed infestations, improve visitor facilities and fix broken signage and equipment.
It will also boost conservation and cultural heritage management and provide housing for rangers.
Environment Minister Tanya Plibersek said many national parks, including some of the country's most iconic, were falling apart.
"We've got parts of our commonwealth national parks that were closed to visitors because they weren't safe to visit, we've had roofs coming off buildings," she said.
"One of the most alarming things I heard was broken or missing crocodile warning signs. We need to better protect these parks."
The funding will go towards projects in Kakadu, Uluru, Booderee, Christmas Island, Pulu Keeling, Norfolk and the Australian Botanical Gardens.
Tourism and Transport Forum Australia chief executive Margy Osmond said the commitment would help attract more domestic and international tourists.
"Since the pandemic, more travellers are seeking out nature-based experiences," she told AAP.
"We need to invest in our national parks to take advantage of this growing appetite for nature-based tourism or else visitors will head elsewhere."
Ms Plibersek said she was excited about the additional jobs the funding would create.
"A lot of these jobs are in remote locations and national parks already have 30 per cent Indigenous staff," she said.
"These are good, full-time, permanent jobs for traditional owners managing their own country.
"This is something that's a huge investment for our future."
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