Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

A phallic shrine to a princess goddess in Krabi, Thailand.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.

There has been an astronomical clock on this spot since the 14th century.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Cold war icon and onetime "hole" in the iron curtain.

Go surfing on this urban wave, "hacked" by local surfers.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A haunting collection of the vanished and disappearing natural world.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

This museum houses an imposing skeleton army comprised of creatures great and small.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The ancient tomb acts as a calendar that keeps perfect time.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Famously misunderstood wonder of the ancient world

An unusual round church in London with a Templar past.

A gallery specifically dedicated to the botanical illustrations of a remarkable traveling lady.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Rebuilt remains of a temple to Roman god Mithras.

Hear the quietest sound from across the dome.

London's smallest police station is barely the size of a phone booth.