This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

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

Come for the flowers, stay for the bats!

One of the oldest theaters in Australia, it's also said to be haunted by a performer who died on stage.

The bullet-banged DIY suit of armour belonging to Australia’s most famous outlaw.

A unique seaside cave where Aleister Crowley faked his own death.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The oldest housing complex in Riga is a mini timeline of architectural trends.

A black cat protests the City Guild in Riga's Old Town.

Flamboyant architecture from the turn of 20th century.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

3,000 market stands in five former Zeppelin hangars.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.