At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

A monument stands at one of the starting lines of the Trans-Canada Highway, formerly the longest uninterrupted highway in the world.

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

The floating gallery illuminates the heart of Québec City's arts district.

The commemorative stone column conceals a secret laboratory.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

This colossal reptile celebrates the history of the now-defunct Canadian Turtle Derby.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

This colorful statue welcomes visitors to a Barcelona park.

Its columns were all carved from the same white oak tree.

Dedicated to the people of Indian Head, Saskatchewan.

This memorial museum chronicles the apocalyptic destruction of the First World War.

Housed inside a replica church, its collection honors the Black community displaced by the Halifax government.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

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

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

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