This church in Pittsburgh is home to the largest collection of religious relics in North America.

Nearly four centuries after its founding, remnants of one of the oldest planned communities in North America are still visible in southern Brooklyn.

The best way to get a sneak peek at the movies.

How did a historical Black burial ground become a Staten Island strip mall?

The bones of two medieval royal lions were discovered at the historic fortress.

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

The pockmarks across the building's facade are remnants of the Blitz.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

The commemorative stone column conceals a secret laboratory.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

An incarceration museum on the spot of possibly the oldest prison in England.

This historic building displays the remains of a victim of the devastating 14th-century plague.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

The curios of pharmacist and collector Henry Wellcome.

On the eve of a condemned prisoner's death, this bell rang 12 times outside their cell.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

This striking statue brings a scene from the African savannah into central London.

A recreation of a sign that Charles Dickens used to see on his walk home.

A lasting remnant of The Blitz.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

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

The Underground Railroad passed right through this historic Brooklyn Heights church.