One of the world’s largest suspended aquariums, located in Dubai Mall.

A secret hatch containing two parchments was discovered in this statue over 40 years after its installation.

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

A Nesting Doll of Churches.

Breathtaking and huge 430 year old maps of Italy.

When this 400-year-old fountain fell into disrepair, officials covered the mess up with what looks like a giant soup tureen.

This unassuming bridge is most likely one of Michelangelo's unfinished masterworks.

Plaques on its facade commemorate the Tiber's most destructive deluges.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

The world's most active stratovolcano is almost always erupting.

Italian cave with exceptional acoustics and an unsavory history.

According to Greek mythology, this natural spring is the home of a freshwater nymph.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A small but very fascinating fountain in the center of Rome with four books and a deer carved.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

An iron dragon with a long neck covered in feathery scales perched above one of Venice's most popular squares.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

Go inside to really appreciate this 500-year-old technological masterpiece.