The exterior of the Temple of the God of Adventure is exceptionally ordinary and unassuming – just a very large house, really. Although built by a divine race and naturally containing Divine Power, it doesn't stand out much at first glance.
The interior features are indeed powerful, yet their appearances are quite mundane.
Strangers walking in might assume it's the temple of some obscure, minor deity, and the vast size perhaps suggests housing for several of these lesser gods.
Ma Lin has a priest's hall within it, where he can study various adventure-related Divine Arts and handle assorted affairs.
Some locations seek to establish their own temples to the God of Adventure but lack the funds and manpower, which requires Ma Lin's approval.
Generally speaking, he approves thousands of small adventure temples at a time for the use of numerous adventurers.