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."

This is the largest cemetery in Ireland and the first cemetery museum in the world.

This pub built its reputation pouring post-shift pints for employees of the cemetery with which it shares a wall.

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

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

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

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

Experience what life was like in Ireland during the Viking and medieval ages.

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.

At the center of London’s oldest roundabout stands an obelisk that was erected in 1771, but spent several decades elsewhere.

An inverted staircase above the entrance to the Bethnal Green Underground Station functions as a memorial for people who lost their lives during the worst civilian disaster in the U.K. during World War II.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

It holds a fabulously designed tribute to astronomer Edmond Halley.

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

This building contains a door only used by members of the royal family.

A building claimed to be London’s smallest house has an obscure history.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

A jumble of concrete on the corner of one of London’s terraced buildings is actually a work of art.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

Two tombstones associated with the much-beloved children's story.

A statue of the original Pearly King is hidden in a church's crypt.