Tall columns of volcanic basalt make up this improbable-seeming rock formation.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

Thirty creepy ghosts now inhabit this decaying 14th-century church.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

The Hveragerði fissure runs through this unassuming shopping center.

An architect transformed this abandoned cement factory into his castle-like workshop.

World-famous, Pink's still manages to keep its prized cult fetish status.

London's amazing modernist public square that never was.

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

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

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A kaleidoscopic warehouse-maze of handmade neon signs.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

This controversial museum includes such detested exhibits as a chocolate suicide bomber and fecal-smelling digestion machine.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

Every part of this unusual home is built into the sandstone rock.

Experience park where visitors are told to expect the unexpected.

This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

A massive wintry wall of snow up to 66 feet tall flanks a highway through Japan's mountains.