An open-air sewer system that was covered piece-by-piece over 300 years.

A collection of weird and wonderful art fills a former houseplant nursery.

This ghost town in Belgium will lose its street art when it ceases to exist.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Perhaps the most spectacular grotto along the Algarve coastline.

This small chapel is built of human bones and decorated with a golden skeleton.

This gruesome biblical parade celebrates the one day a year that a bit of Jesus' blood turns to liquid.

Christ's blood preserved in a Belgian town.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

The oldest cemetery in Belgium.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

You would never come across this tiny green oasis if you didn't know it existed.

This Swedish astronomical clock was in storage for almost a century before its glorious workings were put on display once more.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.