Deep in the Negev Desert, the world's tallest solar tower looks like a sight straight out of science fiction.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

The most peaceful "country" in the Middle East.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

A railway bridge leading nowhere stands lonely in the middle of a meadow.

An intricately carved Viking church overlooks a glistening fjord.

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

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

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

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

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

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

Budapest's Communist-era statues, banished to the suburbs.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Something's watching you.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.