It was partially explored by cave explorers from San Antonio, Texas in 1956.

The river had been partially explored by John Finlay, a colleague of Alexander Mackenzie, in 1797.

There is some archeological ruins near the town of San Miguel Ixtapan, which have only been partially explored.

The 1920-1922 Central New Guinea Expedition had as goal to reach the mountain from the north coast over a route partially explored in a 1914 military expedition.

Maria confirmed that the expedition had partially explored the other gorge and found it far richer in bones than the one they were in.

Mentioned briefly by the Goofy Service Jerks, and was partially explored by Heyoka in the final issue of the first run.

To date, the site is only partially explored.

The unknown outer hemisphere, partially explored in some of the later books, holds the stronghold of the hostile Mind Wizards.

Two have been partially explored.

Other caves which are part of the same system have now been partially explored.