The world's first cageless zoo is working to save endangered Tasmanian devils.

It's said that visitors can "see" Tasmania inside this cave.

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

This extraordinary geological oddity resembles human-made pavement.

Three women and a 10-year-old boy are immortalized in this sculpture memorializing the 13,000 women and children convicts sent to Van Diemen’s Land (now Tasmania) between 1803 and 1853.

Bronze statues honor the brave explorers who passed through this Antarctic gateway.

This simple sailing boat is one of the oldest preserved fishing vessels of its kind in the world.

This 17th-century house has a long and colorful history.

The remnants of a WWI naval mine that once terrorized the country now decorates a street.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

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

The former home of Norway's greatest romantic composer.

A memorial to 350 people burned at the stake for witchcraft.

A favorite with sightseers and locals alike, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

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

Largely overlooked, this little fountain on Museum Island is a whimsical tribute to a Prussian king nicknamed the “Fatty Flounder.”

One of downtown Berlin's last reminders of its Communist past.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

An intentionally grounded cargo ship remains half-buried in the sand.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.