A thought-provoking outdoor art installation sits in the seat of German law.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

The most impressive of Basel's three remaining city gates.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

A town that sets itself apart with supersized designer seating.

The first green space constructed on an elevated viaduct.

Three bridges straddle a stream, one stacked upon the other.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Check out engineering marvels of the past at this unintentionally retrofuturist museum.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A geothermal energy project gone wrong is fracturing the city's picturesque architecture.

An unassuming Swiss institution houses Europe's largest toy museum.

This artistic fountain display pays homage to this area's theatrical history.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.

An interactive exhibition space dedicated to the kinetic sculptures of Swiss artist Jean Tinguely.

A futuristic rocket marks the spot where three borders meet.