The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

A forgotten "city of water" underneath the famous Trevi district.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Its interior is adorned with some of the best examples of early Christian mosaics.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

An Ecuadorian haberdashery that sets the record straight about the so-called "Panama" hat.

The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.

A swing to dangle you off the very edge.