The stunning interior of this Gothic church is covered in ornate gold details.

A hidden three-foot-wide house separates these two regal churches.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Elaborate tile work in this railway station tells the story of Portugal.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The broken skateboards that became a poignant memorial to a murdered skater.

This luxury shopping lane has been protected by its own tiny police force for over a century.

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

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

London's smallest police station is barely the size of a phone booth.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

A famous burial ground with a history both grim and literary.

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

The Great Fire of London and the regulation of one-way streets both started in this alley.

An unusual round church in London with a Templar past.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

The townhouse where the English poet created some of his most influential work has been preserved in tribute.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

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