Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

Graffiti covers the walls of a room where university students through the centuries have waited nervously to defend their theses.

Mosaics created from 11 million cigar bands.

A Netherlands hotel where you can sleep inside a wine barrel.

Yup, that's a 330-foot yacht passing over the highway.

Two gravestones clasp hands over the religious divide.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

This unusual elevator doesn’t stop or slow down.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

One of the largest caves in the world open to the public.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

This riverside restaurant has been serving customers since 1146.

Money made from smuggling sugar helped create this wondrous rock maze in honor of the Prussian Queen Louise.

This German museum is devoted to all aspects of grave culture from headstones to coffins.

In this truly magical place, rent hasn't been raised since the year 1520.

Dedicated to a brave pooch who fought a tiger to save a young child.

Serbia's master of striking memorials erected a forgotten, hidden gem in the hills outside a tiny village.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

In the hinterlands of Serbia's capital, a giant reflective mushroom houses an aeronautical history of the former Yugoslav republic.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Medical history with an amazing, if frighting, collection of wax diseases on display.

Beatlemania is still going strong... at least in Kazakhstan.

One of the most horrible legacies of the Cold War is a site where the Soviet Union tested nuclear bombs on civilians.