Medicinal spa created from the mineral-rich runoff of a geothermal power plant

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

This bronze statue was dedicated to a 1966 Beatles hit.

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

The fake World Cup prize was secretly created after the first one was stolen in 1966.

The commemorative stone column conceals a secret laboratory.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A naturally mummified 2,000-year-old man.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

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

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Giant, friendly pelicans in Central London, the most unlikely of places.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.