This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

Seat of the Duke and Duchess of Devonshire for centuries.

This antique prison is a tourist attraction with a sordid past.

The oldest residential street in Europe also features an optical illusion.

Fascinating town where normal life interfaces with the occult.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

The largest greenhouse in the world is home to over one million types of plants.

Famously misunderstood wonder of the ancient world

The sign at the garden gate reads: “These Plants Can Kill.”

Take a hike to this remote, scenic tea stop in the Canadian Rockies.

An effigy of Vancouver's Gastown neighorhood's namesake.

What happens when a sculptor has to find a way around a 100-year-old copyright.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

One of these two land speed record-breaking vehicles went so fast it shattered the sound barrier.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

This eye-catching roundabout sculpture commemorates one of England's best World War II-era "shadow factories."

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

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

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

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