A delightful museum entirely dedicated to the tiny homes of dolls.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A statue honors the children who fought Nazis in Poland.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A hidden art gallery in an abandoned Warsaw fort.

A heavily politicized roundabout discussing the state of a heavily politicized country.

These plaques found across Warsaw commemorate the sites where executions or battles took place during the German occupation.

Warsaw's fantastically preserved gasworks...almost.

At night, this memorial illuminates a ghostly outline of a footbridge that connected two sections of the Warsaw Ghetto.

Order “Proletariat’s Cutlet” at this communist-themed restaurant allegedly once visited by Lenin.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

An agreement meant to honor the Duke of Buckingham led to this unusually-named passageway near Charing Cross.

A relic from one of London's worst 19th-century slums.

This overgrown Victorian chapel made of corrugated metal looks utterly out of place.

An Iron Age hillfort rooted in Arthurian legend was made famous by musician Peter Gabriel.

In addition to escorting prospective couples to and from ballrooms, this lane was also a place for gentlemen to settle scores.

This restaurant's specialty is "a major enigma for food historians."

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

Eighteenth-century home, where Herschel discovered the planet Uranus.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.