Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

Buried for centuries, this hidden cellar is all that remains of London's medieval Whitefriars Monastery.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.

One of the greatest movie directors of all time lived and worked in this London flat from 1926 to 1939.

This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Hear the quietest sound from across the dome.

Rebuilt remains of a temple to Roman god Mithras.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

When you're a great Russian Tsar, even your vomit gets a statue.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

In this Brazilian city, a vertical graveyard rules the skyline.

Despite their macabre past, these hooks are said to bring good luck to those who touch them.

This unassuming bridge is most likely one of Michelangelo's unfinished masterworks.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.