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

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

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

One of England's most famous churches hides a pair of little known architectural treasures.

Long before wi-fi, this public seat provided the wonder of being online while outdoors.

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.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

A computer bug so primitive it was an actual insect.

Its collection includes a broad array of social, geographic, graphic design, and political history.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

This hidden green space is the city's second largest conservatory.

A living memorial to the trees London lost during the Great Storm of 1987.

This secluded walkway overlooks a magnificently wild London green space.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Hidden beneath the streets of London is a secret subway that only carried mail.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.