Where are the underground openings to the underground tunnels in south Florida?

Question

I know there is a network of underground tunnels around the world. But, I have not been able to find information on any in Florida.

Answer 1

UNDERGROUND AIR TUNNEL SYSTEMS

An open loop, underground air tunnel system cools

or heats the ambient air passing through it. This air is

then introduced directly into the conditioned space of a

building. In order to reduce the required tunnel length,

a closed loop system may be used. In this system, the

air from the conditioned space, with some ventilation air,

is recirculated through the underground tunnel. Open

and closed loop systems can be useful for air

conditioning agricultural buildings. However, the threat

of air contamination from any possible bacterial growth

Normally, heating and air conditioning systems have

average year-round COPs of about 2.0. However the

COPs of the systems utilizing underground air tunnels

are much higher. For open and closed loop systems, the

COP can be as high as 10. By doubling the COP over

a conventional system, the energy input (energy that one

pays for) is reduced by 50 percent.

In addition to energy conservation, this technique

also increases the capacity of a conventional system.

Answer 2

The underground openings are underground, so unless you plan on digging you're not going to find them.

Answer 3

Just off shore in the Bermuda Triangle.

Answer 4

Try a manhole cover.