An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

This colorful and fiery mural depicts the Irish folk story of the beloved hero Cuchulain.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

The modern birthplace of Irish freedom.

This small, ingenious cannon once helped regulate Parisian life.

This impressive castle looms over small German town.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

A meteorite-bounded town in Bavaria.

In this truly magical place, rent hasn't been raised since the year 1520.

If you ever wanted to touch a medieval mercenary’s three testicles, look no further.

A circus legend leaves an unexpected endowment.

The oldest house of worship in Palm Beach has a wonderful tropical garden.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

A towering monument to war, located on a beautifully peaceful hill.

An abstract representation of weather in Sweden.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

A hidden three-foot-wide house separates these two regal churches.

This historic streetcar system has been running since the 19th-century.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.