These desert alfalfa farms redefine the meaning of crop circles.

An agricultural research library housed in a former Odd Fellows Lodge.

This former coal gasification plant found a curious second life as a popular public park.

This restaurant offers the original California cuisine.

The dishes at this restaurant by The Sioux Chef celebrate indigenous heritage.

At an estimated 3,800 years old, this olive tree is one of the oldest on earth.

Among the best preserved megalithic monuments in the Aragón river valley.

Only a few pieces remain of a grand 16th-century water clock that once announced the changing hours with the sound of bells, gongs, and drums.

South of Bologna, a limestone grotto with a protruding waterfall and a floor full of cave pearls.

A historic structure that once housed pigeons used by farmers to help fertilize farmland.

The warmth and creative kitsch of a quilt engulf every patron who visits.

The oldest ruins at this castle overlooking Georgia's Terek River Valley date back to the 10th century.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

Dead weights honor the dead of Portugal's fishing industry.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

Hidden beneath the streets of London is a secret subway that only carried mail.

Underground farm located in a former bank vault deep within the bowels of Tokyo's business district.

The ancient remains of this natural fortress can still be found along the Silk Road looking surprisingly preserved.

One man's quest to collect artifacts from every aspect of human life has resulted in this eclectic Argentinian museum.

The remnants of a failed socialist commune can still be found just off a California highway.

This soda factory is one of the last in America to use real cane sugar despite the protestations of Dr Pepper.

This grand hydraulic installation has provided water for townspeople since the Middle Ages.

A piece of India inside a piece of Bangladesh inside a piece of India inside a piece of Bangladesh.