This memorial park stands on the site of one of the largest mass executions of the Second World War.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

Geothermal waterfalls in Tuscany.

A stunning bridge that appears as if it's lunging to the shore, and has a legend of a devilish architect.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

Museum in a swimming pool where the water still flows.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

The Rozenberg wind wall in South Holland makes for smooth sailing through the Calandbrug canal.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

Sculpture that doubles as a time capsule so that life can survive radiation outside Chernobyl.

This derelict superstructure was a very important warning system for the Soviet military.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

An enormous concrete structure built over a nuclear crater.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

Natural cathedral designed by Italian artist Giuliano Mauri.

Siberian whale bones stand as cairns marking location of an ancient butcher yard.

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

Bouncing, delightful, mechanical art at the MIT Museum.

Steadily reminding Czechia of its past.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

A tunnel dug through the side of a mountain by hand provides convenient yet death-defying access to a small village in China.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.