Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

A public park off the beaten path with a beautiful waterfall and 13th century Cistercian abbey.

The fantastic architectural models of a French traveler.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

This is what trains will look like after the zombie apocalypse.

BDSM, 1930s Style.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

A modern-day Lascaux cave underneath Paris.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

The first green space constructed on an elevated viaduct.

This colorful and fiery mural depicts the Irish folk story of the beloved hero Cuchulain.

Though they've since been renamed, these two streets hint at Dublin's darker days.

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

This pub built its reputation pouring post-shift pints for employees of the cemetery with which it shares a wall.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.