The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This small, lush island has a long and bloody history.

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

Famously misunderstood wonder of the ancient world

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

The first mechanized factory in Spain is also one of the most significant mints in the history of money.

This beautiful spit of land was once the summer playground of the king of Spain.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

This chapel is the site of a yearly pilgrimage that originated during the Middle Ages.

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Giant granite sculptures representing family on the northern coast of Spain.

The oldest Roman lighthouse still in use.

In Spain, the ruins of a Roman military camp sit along a flooded section of a river.

Glasgow’s piece of the patron saint of love.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.

Where commuters walk through remnants of an ancient Greek necropolis.

A sharp sculpture made of thousands of pieces of jagged glass.