Water still flows through the oldest Spanish aqueduct in America.

In the depths of Glasgow Cathedral's crypt, one pillar stands out from all others.

An 18th-century religious argument etched into stone.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A scattered trail of street art adds a pop of color to the city's stark structures.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

One of Detroit’s oldest blues clubs stands in defiance of the passage of time and the city’s shifting fortunes.

Like Mardi Gras, only everyone's a pirate.

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

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

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

The house where the writer spent his formative years.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

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

Tiny silver and copper fish set inside blue-green lights are like windows to the underwater world.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Originally commissioned as a sculpture to reflect the history of Belfast's red-light district, the final sculpture has been banned from Belfast public land.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

It was once nicknamed "the most bombed hotel in Europe."

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.