Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Three prestigious academic collections come together to create a world-class natural history museum.

Impossibly life-like natural history models created out of glass by a father and son.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Remnants of the Nazis' occupation of Denmark linger along the sand.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The Tudor-style cottage in the middle of the square is not quite what it seems.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A Nesting Doll of Churches.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

A fascinating insight into daily life in the Eastern Bloc.

The most visited, and possibly most controversial, museum in Germany.

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

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

Tiny memorials honor individual victims of the Holocaust.

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

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

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