This black shoreline is made up of exploded lava particles.

An icon of the city, this chapel features an amazing dome ceiling and offers panoramic views.

Ancient catacombs form the foundation for this Rococo orgy of a church.

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

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

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

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

The underground sanctuary of a mysterious ancient cult.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

This hydraulic power system in London was, at one time, seen as a rival to electricity and the last of its kind to shut down.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

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

Two plaques commemorate the site of Shakespeare's first theatre.

This may be the last of London's wooden pavements, which were once a common sight in the city.

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

It's a mystery why these remains were found with no traces of their bodies in sight.

Preserved behind glass, the ruins of a medieval building used to store human remains.

This pub boasts a curious history and may have inspired a Dickens character.

An architectural oddity hides in plain sight on this iconic London bridge.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

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

This inn of the court provides a fascinating window into London’s legal and architectural history.

What might be the oldest living tree in London has survived fires, bombings, and estate agents.