This spectrum of a star was observed by one of the world's most accurate spectrographs. 

A stone from Africa's tallest peak is immortalized in a Potsdam palace—but is it actually the mountaintop?

A memorial to a Swedish hockey player's "encounter" with aliens.

A slice of central Asia in the middle of Berlin.

A wunderkammer of mysterious objects and stories.

Super-heavy Nazi architectural experiment.

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

This spherical sculpture has also been dubbed "the steel orange" due to its likeness to a massive, sliced piece of citrus.

This former quarry is now a picturesque gorge that hides a sunken lake.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Enigmatic bug-like sculptures mystify drivers along a Swedish highway.

Finally reunited, the three effigies now stand in a museum courtyard.

The place to be if you love vintage Swedish cars.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

The immortal Hollywood star rests in peace in an unassuming Swiss village cemetery.