A 1:2 billion-scale solar system leads visitors into this German university town.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

A giant scale model giving a sneak peek at what urban planners see for Shanghai by 2020.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

It houses the remains of a 17th-century version of the Titanic.

The home of the Dead Sea Scrolls is an abstract modernist dream.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

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

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

Breathtaking and huge 430 year old maps of Italy.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The most famous location in China was home to whole dynasties worth of imperial rulers.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

A beautifully eclectic mix of architectural styles.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.