Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

Hidden in plain sight, this creepy sculpture watches from above.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

An obsolete, long-forgotten advertising character lingers on this Sainsbury’s balcony railings.

The shop where the girl who inspired the beloved character once bought sweets is now a book-themed commercial curiosity.

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

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

The extra platform at Gloucester Road has been used for art displays for over 25 years.

A totem pole of heads to represent the different stages of life.

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

The ground on which Shakespeare’s initial playhouse once stood.

This hand-painted advertisement is a literal sign of encouragement, however unintentional.

One of the four clock faces on this church is mismatched, in a nod to a historic slight.

The remains of the debtor’s prison that shaped Charles Dickens’ life and writing.

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

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

Largest lake in Great Britain measured by surface area.

The man-made mound once voted the best landmark in the UK.

Thought to be Britain’s earliest purpose-built viewing station, this small hut frames a magical waterfall.

The world’s second-largest flood defense barrier has protected London for decades.

An enormous artwork that colorfully celebrates over 150 years of US military achievements.

A man-made island in scenic San Francisco Bay.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

The restored and active Victorian-era final resting place of San Francisco.