Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

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

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

This secret garden has bloomed into London's most unique hub of urban creativity.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

The last four extravagant street signs of London's historic banking street.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

There's an exclusive Beefeaters pub hidden in the Tower of London.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

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

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

One part local history, 99 parts gruesome haunted house.

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.