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

This giant wooden treehouse within a sprawling garden has its own eatery.

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.

This elegant arc of a waterfall marks a religious turning point.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

The deadliest diving spot in the world is also a stunning geological marvel.

Squeezing inside this deep, narrow canyon reveals a festival of desert colors.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

The lighthouse is on a island which is connected to another island, which is connected to another island, which is connected to one of the largest islands in the world.

The remains of centuries of copper mining appear like an alien landscape.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

A hundred copies of Antony Gormley's naked body stare out across the water.

These rose marble urinals are the most luxurious loos in Liverpool.

The red letters in the literary pavement leading to the library form a mysterious code.

Charles Dickens described the concert room in this amazing Victorian hall as "the most perfect room in the world."

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

The tower was originally used as a chimney for the waste incinerator of St Johns Precinct and Market.

This bronze statue was dedicated to a 1966 Beatles hit.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

Most of Britain's gold reserve was secretly stashed here after the start of World War II.

The grand complex of buildings that comprise Liverpool's Exchange Flags includes a vast World War II bunker that has been frozen in time.

This aging storage facility is the world's largest brick warehouse.