Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.

A space-grade telescope mirror lies discarded in the shrubs.

A large collection of solar and night-time telescopes dot a small area on the Teide mountain range.

An unexpected ghost village lurks on the southeast coast of Tenerife.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

Morocco's largest Jewish cemetery.

The largest cactus farm in Africa.

The grounds and buildings of an old wood pulp mill have been transformed into an innovative art park and museum.

This record shop and unofficial black metal museum is an ode to Oslo's heaviest musical export.

St George's Leprosy Museum depicts the gruesome afflictions of those suffering from the disease.

Thousands of miniature bronze sculptures have taken over this city square creating a unique art installation.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

Houses are tucked between, on, and underneath giant boulders.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Britain's oldest miniature railway.