An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

Constructed along the shores of Lake Zurich, this pavilion is a walk-through work of art.

This building features dozens of faces along its facade, although one is a bit chilling.

Two churches shoot bottle rockets at each others' bell towers in an unusual Easter celebration.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

Described by William Wordsworth as a "World of Wonder."

Legend has it that any woman who kissed this statue would soon be married.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

This monumental mural crafted nearly 40 years ago is still in perfect condition.

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

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

When the rain falls, this drain system turns into a musical instrument.

Follow the original medieval paths that wind through this intriguing section of the city.

One of the few places to grab a beer in Fez is a former British consulate.

This restored 17th century synagogue is one of the few remaining structures in Morocco’s ruined Jewish quarters.

The ruins of an early-18th-century complex that could once house up to 12,000 horses.

Designed as a labyrinth, this subterranean prison was crafted without bars or doors.

A tunnel with windows, so you don't miss out on the impressive views.

This hidden 13th-century tavern room has a few Shakespearean connections.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

This Norman castle was once the site of a Victorian-era prison, and now exists as a luxury hotel.

A crazy maze of a hostel, where every trap door and secret entrance brings you to a new wacky, wonderful room.

In the middle of a remote desert town is a surprisingly opulent hotel.

These pillars at the main entrance of this church are actually a hidden musical instrument.