A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A hands-off space for graffiti artists to hone and display their skills.

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A Japanese video game arcade hides in the back of a Swedish pool hall.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

Week-long block party becomes a competition for the best decorated street.

A surreal pile of colorful junk fills a small yard in an otherwise gray neighborhood.

This towering statue of Jesus provided internet to the surrounding area.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

Two churches shoot bottle rockets at each others' bell towers in an unusual Easter celebration.

A spectacular cave and a beguiling lake.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.