This banal Parisian entranceway is not what it seems.

The tombstone of an unfortunate explorer who disappeared in the Paris Catacombs.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

A church of bones, decorated with 40,000 human skeletons.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

Steadily reminding Czechia of its past.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

The not-quite-incorruptible St. Bernadette is perhaps the most beautiful of preserved saints—with a little help from Paris.

A fortified palace in the shape of a ship on the Thiou river.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

This watchtower once presided over the Berlin Wall.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Residents of Berlin take their coffee and cake in one of the city’s most restful spaces: a cemetery.

Berlin's old airport.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

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.