This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

Atop this former dutch railway office sits an interstellar work of art.

The cutest way to stay safe in traffic.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

Remarkably preserved body discovered in a peat bog.

This Ottoman-era church is hidden amid a busy tourist area.

These ancient ruins hide in plain sight next to a dessert shop.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

Ozymandias’ time-keeping temple.

This eatery is emblematic of the connection between Jamaica and Nubia.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

A tunnel with windows, so you don't miss out on the impressive views.

These mid-century motels once housed the workers who built the Glen Canyon Dam.

This unique art installation used boiler tubes from a decommissioned power plant to resemble Antelope Canyon.

A sharp bend in a dramatic river canyon cut through red rocks.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

This site is home to ancient petroglyphs and pictographs dating back to 6,000 B.C.

The final resting place of a 19th-century gold prospector and convicted cannibal.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.