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

A historic fire call point.

For more than 170 years, this family-run bakery has been serving Berlin’s best Baumkuchen, or “tree cake.”

A century-old shot ball factory tower is open to the public once a year.

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

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

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

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

The ruins of a medieval monastery named after a type of tree.

An oddly conical beacon perched atop beautiful Irish cliffs.