This wooden hotel is a temple to German sustainability and forest conservation.

Model Trains and Much More in Hamburg.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

Remnants of an exploded schooner and wrecked submarines form a breakwater.

Hamburgers are intensely proud of their tunnel beneath the river.

A wunderkammer of exoticism immortalized by Tom Waits.

Wax models of disease and deformity are on display at this German medical museum.

Iceland's tribute to its thankless civil servants.

This aromatherapy shop and mini-museum cofounded by the Sigur Rós frontman documents Icelandic history through scents.

This oceanside Reykjavik spot is speckled with recycled sculptures and large stones.

This rusting remnant of the local herring industry is being given a second life.

The world's largest collection of witchcraft regalia.

The social hall of this former factory is a Communist-era time capsule.

At this 16th-century monastery in rural Bulgaria, visitors can also spend the night.

A supersonic jet stands on a pedestal in this rural village as a monument to military aviation.

These cascading falls resonate throughout the Bulgarian forest.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

An architectural marvel that spans the Arda River, and has stories of a haunted past.