A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

This drowning bronze monument marks the spot where one of Australia's great engineers died by suicide.

One of Australia's largest collections of preserved animals is on display in a historic theater.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Climb inside an iron crystal magnified 165 billion times its normal size.

Lavish royal estate punctuated with heated greenhouses.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

A surreal statue honoring Prague's favorite literary son.

One of the oldest, well-preserved water treatment facilities in all of Europe.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

A crucified and bearded female saint.

An Orwellian sculpture with eyeball cameras watches passersby.

This doorless 20th-century elevator doesn't stop or slow down.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

A Jenga-style cylindrical tower of books that appears to go on forever.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Two stunning 17th-century libraries and a cabinet of curiosities.