A collection of noses tucked inside an art museum reveals how times have changed.

This "floating railway" is one of the world's oldest monorail systems.

A varied collection of brains in alcohol.

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

A somewhat mysterious biomedical museum housed inside a Spanish university.

Cliffside houses provide a spectacular view from their perch above the valley.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

This semi-secret storybook hedge maze is also the oldest garden in the city.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

This luxury shopping lane has been protected by its own tiny police force for over a century.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

The last bastion of Roman presence north of the Alps looms over a German town.

A preserved college lock-up that recalls a clubhouse approach to discipline.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This former sugarcane transport tunnel is now a portal to a lovely beach.

The highest peak in Puerto Rico is home to a rare fern that can only be found on six trees at its summit.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.