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

3,000 market stands in five former Zeppelin hangars.

The most loyal of little dogs, or a Victorian era publicity stunt?

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

360° views of the city plus five floors of optical illusions and hands-on science.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

The world's largest wooden structure.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The celebrated eyesore created by starry-eyed sweethearts.

Ozymandias’ time-keeping temple.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

The tallest sea cliffs on the Southern Hemisphere are a climber's worst nightmare.

The largest collection of Indigenous Australian artifacts in the world, and the rare museum where wood-and-glass cabinets have trumped interactive exhibits.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

Three-story concrete ram with a permanent gift shop.

A massive metal lobster welcomes tourists to a roadside restaurant.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Less a museum than a bizarre fantasy world created by artists and engineers.

Taxidermy of the racing horse with a huge heart, who inspired hope in the Depression.

The word 'wunderkammer' translates as 'wonder-chamber'. This Wunderkammer is both a museum and a retail store.