This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A hidden plaque is the only reminder of the lost palace where two storied English kings were born.

The lantern carried by the infamous Guy Fawkes when he was arrested while attempting to blow the houses of Parliament and the King of England to smithereens

One of Oxford's greatest treasures likely belonged to England's legendary King Alfred the Great.

A rare specimen of the ancient piggy bank of Java resides in one of the unassuming corners of the Ashmolean.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

When Joseph Marconnott died, he had a unique final wish: to be mummified and put on display.

A cannon designed to fire an atomic warhead.

An ancient Greek monument and a Byzantine church coexist inside this cave.

A funerary monument for two brothers who served in the Roman cavalry.

It's good luck to be mocked by this monkey.

This Norman castle was once the site of a Victorian-era prison, and now exists as a luxury hotel.

One of Europe's oldest libraries.

Tragedy on Little Brewster Island memorialized.

One of the indelible moments of the American Revolution took place at this location.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

The people's champion of the French Revolution was so overcome by grief at his wife's death that he exhumed her in the dead of night to make one final replica of her face.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

One man's unrequited love stands in a glass box forever.