In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Jesus' footprints and the first catacombs in the world.

Architectureal fantasy quarter of Rome.

The final resting place of the poets Shelley and Keats.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The Pope’s secret escape route.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Breathtaking and huge 430 year old maps of Italy.