Macabre astrological automaton clock dating to the late 1400s.

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

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

Remnants of the Roman empire's northern frontier nestled in suburban Glasgow.

Inside this art museum resides one of Glasgow's most famous musical instruments.

Glasgow's memorial to the International Brigade volunteers from Great Britain who fought and died in the Spanish Civil War.

In the depths of Glasgow Cathedral's crypt, one pillar stands out from all others.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A scattered trail of street art adds a pop of color to the city's stark structures.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

These fantastically named natural pools look like something out of a Scottish myth.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This 22-acre botanical garden is home to the largest collection of rhododendrons in the world.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

An unfinished rail tunnel that has since been used to house cheese and bats.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

The world's largest fire hydrant is supposedly tornado-proof.