The mausoleum of New Zealand's controversial prime minister.

This sprawling, Brutalist estate feels like a city within a city.

The only known remains of an extensive Maori settlement are preserved underneath an apartment building.

The "horrid little piggy house" of one of New Zealand's most celebrated writers.

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

How did a fuel storage container become one of the most famous sights in the sporting world of cricket?

Walk through abandoned anti-Russian military tunnels on this volcano at the head of Auckland Harbor.

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

Visit Europe's largest subterranean waterfall, carved by water from the glaciers of the towering peaks surrounding the valley.

A neon-illuminated statue of James Cook at the edge of a historical Auckland wharf makes for an unexpected discovery.

Legend says that Wade the Giant scooped up a handful of earth to throw at his wife, leaving behind this round valley.

One of London's lost rivers runs through a pipe over the tracks of this subway station.

This 46-foot-tall carving of a legendary Māori navigator can only be visited by boat.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

The first regular high-definition TV transmissions were made from this seemingly out-of-place mast located on one corner of a Victorian-era entertainment venue.

A mysterious castle "in the clouds" has had many lives including a radar bunker, dog hotel, and conference center.

A bronze statue to commemorate an Auckland library's beloved feline resident.

With a history stretching back to the 16th century, this pub has a few stories to tell.

These remnants of Old London Bridge possess unique acoustics that allow for whispered conversations to carry from one side to the other.

The bones of prehistoric animals and early signs of human habitation have been found inside Malta's "cave of darkness."

Despite the name, these small saltwater swimming pools have nothing to do with the Romans.

The location Geoffrey Chaucer and tale-telling pilgrims set off for Canterbury in April 1386.

One of the largest medieval barns in England and architecturally one of the finest.

The Cape of Good Hope is not quite as low as you can go on the African continent, but it's still geographically significant.