A pagan tradition of draping trees with rags eerily lives on.

The colonial city's social history is reflected in its fanciful door knockers.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

This psychedelic tourist trap is a leisurely descent into madness.

Light still pours into the ruins of this ancient Islamic observatory.

The solitary cairn marks a mysterious death that's still controversial more than two decades later.

From here, the loch appears to take the shape of mainland Scotland.

A double cantilever system bridge that was designed to prevent flood damage.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

A close look reveals that the Scottish monument is just slightly off-kilter.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

Geodesic dome luxury retreat in the Scottish Highlands.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

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

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

Cascading waterfalls mark the gateway to the ancient burial place of Clan Macnab.

A weird and wonderful collection of items that pique curiosity and haunt nightmares.

The heads of two giant mythological water horses honor Scotland's horselord past.

This abandoned mausoleum from 1815 sits deep within the forest surrounding Callendar House.

One of four sister bronze sculptures dedicated to the widows and orphans of an 1881 tragedy.