The province announced $2.5 million in funds on Sunday to fix up Ontario Place.
The money will be used to repair existing property and equipment and make sure the grounds follow fire codes and accessibility laws.
The minister of tourism said keeping the waterfront entertainment complex up to snuff will make it more appealing to visitors.
"The Ontario government realizes the vital role Ontario Place plays in attracting local and international visitors to our province," said Jim Bradley in a press release.
The improvements are also meant to make sure venues are safe and family-friendly.
"Ontario Place is a popular summer attraction for parents and their kids, so we are pleased ... to keep our grounds safe and accessible," said Ontario Place chair David Crombie.
The province said the complex, spread over three man-made islands along Lake Ontario, is due for repairs -- some of the buildings opened in 1971.
The original construction of Ontario Place, in the then-under-developed waterfront area, took about 1.5 million labour hours and cost of $29 million.
The maintenance project is part of a $9.8 million plan to repair and rehabilitate four provincial tourism agencies and attractions.
Three other places being brought up-to-date are:
The announcement comes as Ontario Place gears up to host the Rogers Chinese Lantern Festival for the second year in a row.
The over 40 giant lanterns will be lit up from July 19 to October 2.
