Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

This sculpture honors the man who was known as the "Righteous Among the Nations."

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Stockholm's deepest subway station is also a stunning ecological wonder.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Maybe the only restaurant in the world where your seat will be signed by a Nobel laureate.

It houses the remains of a 17th-century version of the Titanic.

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

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

Building owners can take out tiles for free at this repository for historic building materials.

This giant sculpture made of trash is a critique of society's wastefulness.

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.

Legend says this public grazing area hasn't been plowed for thousands of years.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

Used as an example in one of the first dictionary entries for "museum" in 1706.

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."

Hidden in plain sight, this creepy sculpture watches from above.

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

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

One of Europe's oldest libraries.

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