One of Ireland's most infamous prisons for rebels including men, women and children.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The ruins of a church destroyed by both the Great Fire of London and the Blitz, now turned into a peaceful garden.

This striking statue brings a scene from the African savannah into central London.

This religious museum resides in a church crypt next to the founder's house.

The final resting place of a German diplomat's beloved companion.

The medieval woodcut-style artwork chronicles life in medieval London.

On the eve of a condemned prisoner's death, this bell rang 12 times outside their cell.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

The commemorative stone column conceals a secret laboratory.

These ornate arches show how the course of the River Thames has changed.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

Two plaques commemorate the site of Shakespeare's first theatre.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.