This Tuscan lake hides a 13th century town that is still visible when the water recedes.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

This World War II relic let Allied pilots know they were entering neutral airspace.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

The top of society once luxuriated in this world-class hotel, which continues to impress, even in ruin.

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

Renaissance villa and gardens complete with a tormented colossus.