This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Nine caves filled with recently-discovered archaeological finds under the houses and the streets of the most ancient district of an old town.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

Water and windows define this defensive Italian well.

A map of Italy made entirely of trees.

Fountain where visitors can earn a license to be mad.

What appears to be an ancient Roman temple is actually a Catholic church.

This region of the Perugia municipality has an unforgettable name.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

This legendary city has been a tourist attraction for centuries.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A spectacular cave and a beguiling lake.

It's believed emperor Hadrian himself funded this once architectural wonder.

Centuries later, the victims of Great Britain's greatest hysteria are finally being remembered.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

A little slice of Japan and its aesthetics in London's Holland Park.

Catacombs turned marketplace.

Eighty million natural history specimens call this gargantuan museum home.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.