A series of waterfalls so massive they straddle the border of Argentina and Brazil.

A sculpture of a giant hand reaches for the stars in the middle of the Atacama desert.

In the most arid desert on the planet, the world's leading telescope allows astronomers to see more than has ever been seen before.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Da Vinci's equestrian statue, 500 years in the making.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Breathtaking and huge 430 year old maps of Italy.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

2300-year-old Roman road connecting the empire.

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

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

A gateway to a mysterious network of underground tunnels.

The glowing blue Nymphaeum of Emperor Tiberius.

A sulfuric hellscape in southern Italy.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The oldest volcanology research center in the world.

Pompeii's less famous neighbor is still revealing her secrets.

A tower devoted to — and modeled after — the Divine Comedy.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A beautiful young girl said to have been buried alive in her coffin…