This house covered in art created with volcanic rocks is shrouded in macabre lore.

This mosaic-covered bar is brimming with curated curios.

A sculpture of a giant man escaping from the depths of the Earth.

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

Enormous sandstone towers loom within a Czech forest.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.

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

A serene temple with stunning stained glass hides in downtown Dallas.

The ornate structure is part of a building boasting more marble than the Vatican.

A collection of 11 million buttons illustrates the human toll of the Holocaust.

Few of the many visitors to this resort town know of its hidden Maya ruins.

Ruins and statues dot the landscape of this tiny island rich with royal history.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Two ancient Buddhist temples crown this dramatic rocky pinnacle.

This dreamy street will transport you to wintertime in Victorian England.

An ancient Incan convent on Lake Titicaca's Island of the Moon.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

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

The only monument to name all of the passengers and crew who died on the RMS Titanic.

One of Sydney's oldest graveyards hides in plain sight behind a hospital.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

These legendary stone steps were once used to haul coffins up the rockface.