One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

Hundreds of wooden coffins dangle from cliffs and caves in the Philippines.

Yup, that's a 330-foot yacht passing over the highway.

Ecuador's largest Incan ruins show evidence of sophisticated irrigation and diplomacy among the ancient builders.

The remains of an ancient settlement in one of the oldest archeological sites in South America.

This small uninhabited island offers Galapagos-like biodiversity.

An awe-inspiring giant blue whale jaw bone stands in the center of this Dutch island.

Hop aboard a charming bog train to explore this rare open-air museum of peat.

The 20-mile causeway that separates the Netherlands from the sea.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

The largest 19th century panorama in the world still in-situ.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

A miniature city, once ruled by the Queen of the Netherlands.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Graffiti covers the walls of a room where university students through the centuries have waited nervously to defend their theses.

A former plague hospital turned medical museum.

A trio of red, white, and blue stones embedded in the streets of Leiden are markers of medieval territory and law.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

Oldest Museum of the Netherlands is a true cabinet of curiosities.