The world's most elegant power lines.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

One of the largest underground systems runs under Canada's largest urban center.

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

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

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 modern birthplace of Irish freedom.

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

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

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

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

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

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

A particularly disconcerting tribute to Irish martyrs.

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

This probably wasn't what Mao had in mind.

Life and death are on parade at the most reliably perilous site of “the Great Migration.”

Get tall with nature's lankiest beasts and their warthog friends at this Kenyan preserve.

Human ancestor’s 3.6 million year-old footprints.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.