Macabre museum devoted to historical Viennese murders.

This former insane asylum now holds a pathological anatomy museum.

The beautiful baroque library of the Hapsburg empire.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

This elegant arc of a waterfall marks a religious turning point.

Rising from the sea like a stone monster.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

One of the largest bamboo bridges in Asia, located right next to a bamboo school.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

A German apartment building hosting as many trees as human occupants.

This quaint museum tells about more than just the birth of Jesus: "betlémy" are an important piece of Czech history.

Looming communist pillar with a Czech twist.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A mocking tribute to the past and modern leadership of Prague.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Macabre astrological automaton clock dating to the late 1400s.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

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