SubTropolis advertises to be the world's largest underground business complex. Huge underground caverns with a size of almost half a million square meters house 50 local, national and international businesses. There are warehousing, cold storage, light manufacturing and office operations.
The underground caverns are a result of limestone mining using the room and pilar method. This means, the whole layer was mined, but to support the ceiling pilars were left. They are 20m apart, 12m wide room alternating with 8m wider pilars. The floors were paved and the whole mine is now for rent. Because of the huge size it is possible to separate any size of space and even to resize it later by merging it with adjacent free space.
