In this tour you will walk three times underground, through ruins and columns, you will enter a 2000 years old market and cross an island by the oldest bridge of Rome: it will be great fun for the whole family and children! Is it true that every church in Rome is built over the ruins of pagan temples? That's what you will discover when you'll get in Saint Nicholas in Carcere, set over some very old places of worship! A short hop away, by Portico d' Ottavia and Marcellus theatre ruins, you'll cross the oldest bridge of Rome 2000 years old. There you are on the Tiber Island; next comes the underground house of Santa Cecilia, featuring ancient mosaics, mysterious inscriptions and a lavishly ornated crypt; at the end, you will visit the quite unknown church of San Crisogono built over a huge underground house, where archaologists found a large frescoed wall. Don't miss the opportunity to visit these ancient venues, unknown to the general public although set in the very heart of Rome!