Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

A striking symbol of the Bulgarian capital.

Sofia's legislative center is continuously reinventing itself.

"Holy Wisdom" overlooks the city that became its namesake.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.

A miniature of a lighthouse acts as a beacon for what transpires inside this location.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

A book bound in the skin of an infamous criminal, along with countless other specimens.

A quartet of brightly colored mythical beasts stand sentry at this gateway.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This sculpture of disembodied body parts forms a poignant memory of the horrors of World War II.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.

Enter this small nook and you'll be surrounded by 360 degrees of street art.

A remarkable feat of Victorian engineering across the Firth of Forth.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

A six-ton wedding present for the King of the Scots.

The final resting place of soldiers' loyal canine companions.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Rome’s legendary peephole vista is also a former Crusader stronghold.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

This sculpture is an homage to one of the most important Jewish women in medieval England.

This towering monument is dedicated in memory of a most unusually named, yet heroic, horse.

Pivotal in the research of early British Bronze Age life, found near Stonehenge.