Scattered throughout London are ancient remnants of the city's former bounding wall.

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

London's smallest police station is barely the size of a phone booth.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Eighty million natural history specimens call this gargantuan museum home.

This ancient holy well is older than much of the city that surrounds it.

The Dublin sea wall draws walkers, photographers, and fishing enthusiasts.

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

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

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The house where the writer spent his formative years.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

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

The oldest floral clock in the world still functions today.

This statue stands as a message against the ills of Apartheid.

A rare and unique example of an 18th-century door latch calls this restaurant home.

Erected in memory of Sir Arthur Conan Doyle, who was born close to this spot, this statue commemorates the author and his famous detective.

A multi-storied painting that depicts the area's rich and diverse maritime history.

Even though some of the buildings date back to the Victorian era, this research institute is still involved in cutting-edge astronomy research.

These trenches were used to train the Scottish military for life on the frontlines of World War I.