One of Oxford's greatest treasures likely belonged to England's legendary King Alfred the Great.

This 11th century tower is said to be the oldest building in Oxford.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

This centuries-old pub boasts a collection of more than 4,500 snippets of neckties from around the world.

The fantastic charm of England's oldest botanical garden has made it a place of writerly inspiration for centuries.

The stoic structure boasts a whimsical set of stained glass art commemorating Lewis Carroll.

Check the time in 145 countries at once with this East German relic.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

A fascinating insight into daily life in the Eastern Bloc.

This sprawling stone mosaic on Berlin’s Museum Island transforms archaeological finds and local legends into a walkable work of art.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

One of the best-preserved pieces of DDR propaganda in Berlin.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A poignant memorial that traces two hundred years of German history.

Cold war icon and onetime "hole" in the iron curtain.

Tiny memorials honor individual victims of the Holocaust.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

An astonishingly accurate water clock that doubles as an hourly spectacle in this Berlin shopping area.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.