Eldiw · shrine
Lava Dome Cave
Lava Dome Cave is a Dielebi Shrine located north of the entrance of Route 13, at the top of a volcano-like cave. With Dielebi in the party, it opens onto an alternate dimension containing a retro Heatran.
How to Reach It
North of the Route 13 entrance, at the top of a volcano-like cave.
Story Relevance
One of the Dielebi Shrine sites; requires Dielebi in the party to reach the Heatran encounter.
Source: pokemon-xenoverse.fandom.com (Lava Dome Cave and Dielebi Shrines articles, raw wikitext); page marked "Temp Page," high confidence.