A restaurant and observation deck built in a unique broadcasting antenna.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Berlin's old airport.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

A man throwing a giant severed hand towers over Antwerp’s main square.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

Christ's blood preserved in a Belgian town.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Tiny memorials honor individual victims of the Holocaust.

One of downtown Berlin's last reminders of its Communist past.

The final resting place of many of Germany's most famous communists.

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

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

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

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

This monumental work of art symbolizes the coming together of a previously divided city.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.