An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

A quaint medieval harbour where Benjamin Franklin landed in 1776.

One of the great treasures of Neolithic art lies within this carefully constructed pile of rocks.

The first (but not only) upside-down house in Germany.

This 1960's Soviet submarine in Peenemünde Harbor claims to be the largest submarine museum in the world.

A section of destroyed vertical lift bridge stands alone in the Peene river.

The “Coin Cabinet of Dresden” houses a collection of over 300,000 numismatic artifacts, one of the largest of its kind in Europe.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

Mausoleum and Holy Seat of Antiochus I of Commagene.

Balanced on four stone pillars, this historic tower was the site of a tragic political assassination.

A fantastic reconstruction of a 10th-century Viking longhouse.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

Three million year old fossils are exposed for all to see on this Icelandic shore.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

A sulfuric martian landscape that looks far better than it smells.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.