Ground railroad( secret trail)
Crypt.
It would still be called a chapel unless if it is just an altar, then it would just be called an altar. A chapel is a holy room reserved for prayer and practising of faith only.
The Sistine Chapel is the best known of the Vatican's chapels.
a basement..? pretty simple.
Its Called Holmes Chapel
The Sistine Chapel.
Underground water is called underground water, because it is "underground" not because it is fresh or salt. You can have underground salt water reservoirs just like you can have fresh water ones.
Underground water is called underground water, because it is "underground" not because it is fresh or salt. You can have underground salt water reservoirs just like you can have fresh water ones.
Underground springs.
This would be the Sistine Chapel located next to St. Peter's Basilica.
A basilica is a type of (church) building. A chapel is a part of a church. There is nothing called the basilica chapel.,
Natural underground reserves of fresh water are generally called aquifers.