An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Over 50 whirling pools left behind from the glacial age.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

A church of bones, decorated with 40,000 human skeletons.

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

Microscopic scenes; some call it novelty, some call it art.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Macabre astrological automaton clock dating to the late 1400s.

Monument to a suicide protesting the Soviet invasion.

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

Weird wax anatomical models reside here, as do other anatomical specimens.

This secret Australian garden was built on love after a man planted a random bulb he found in the ocean.

A self-funded cemetery with a long list of inhabitants.

The Sun King's military models, saved from the Louvre.

France's most famous cemetery, with some of its most curious tombs.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.