Fifty years of contamination in Scotland's waters.

These ruins of a medieval church are full of architectural mysteries.

This stack of stones honors a murdered 18th-century woman.

A series of three shiny letters mark the boundary of an old refuge for those being pursued by debt collectors.

“It has nae lugs!”

This eclectic sanctuary is a hodgepodge of various architectural styles, all crammed into one building.

A secret door leads to this cozy dive that sells only “milk.”

The location of this historic castle was inspired by a donkey.

This volcanic plug boasts the longest recorded history of any Scottish stronghold.

An Anglo-Saxon cross inscribed with possibly the oldest written work of English literature.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

The 5,000-year-old megalith is believed to be Scotland's tallest standing stone.

Forgotten jail cells beneath this Scottish town hall are now used for delightfully artful storage.

"May prick nor purse ne'er fail you."

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

Once home to a Scottish baronet, this 18th-century historic house doubles as a legendary art space.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

The world's shortest street was created by an awkwardly placed hotel.

A remote island holds what claims to be Scotland's smallest cinema.

The highest lighthouse in Scotland shines from an abandoned island.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.