This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

One man's remarkable private collection of art from around the world.

An unassuming music museum recounts the rags to riches story of a dramatic Portuguese genre.

A unique seaside cave where Aleister Crowley faked his own death.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

The patron saint of spinsters grasps a container of dried blood.

Ruins of a German Castle on top of a towering stone pillar.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

This sprawling Jewish cemetery is one of the largest in Europe.

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

This candy-striped tower is the farthest east you can go in the United States.

This architectural onion has an original 1930's Jerry O'Mahony dining car at its core.

A restored historic movie theater is the perfect place for a regional film archive.

The debris forms a solemn memorial to those who died in a 1963 accident.

A monument marks the beginning of the longest north-south road in the United States.

This massive solar system model is sprawled out across Maine's suburban wilderness.