The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

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

The longest and tallest aqueduct in Britain can actually be sailed across.

One of the few surviving street funiculars in the world.

This Welsh hotel is the spiritual home of the British 1953 Everest expedition, the first successful ascent of Mount Everest.

Deadly scalding and one of the largest hot springs in the world.

The once and future home of New Zealand's famed Pink and White Terraces.

The ruins of New Zealand's largest classical-style church.

New Zealand's only running funicular railway.

The glacier tucked within a New Zealand rainforest.

Legend has it the famous Robin Hood would attend mass at this 12th-century Cistercian abbey in Sherwood Forrest.

Three memorials honor the victims of the worst sports stadium disaster in Britain.

This commercial and retail center was crafted from walled military barracks.

The whimsical steel spider lurking in the shadows of this suspension bridge shows that engineers can have a sense of humor.

This house was home to a succession of park keepers for more than 90 years, but in all that time, it never had a toilet.

A preserved 18th century steel factory.

A historic Georgian building and warm springs.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

A tribute to the women who quietly kept the local steelworks alive during both world wars.

This charming English house was once the home of England's most famous poet.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

One of the highest Roman forts in Britain is set amid dramatic scenery on a notoriously difficult road.