One of Ireland's most infamous prisons for rebels including men, women and children.

The ancient tomb acts as a calendar that keeps perfect time.

This Neolithic passage tomb forms part of a World Heritage Site.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

There has been an astronomical clock on this spot since the 14th century.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

A fortified palace in the shape of a ship on the Thiou river.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

The famous artist couple lived and worked here, in two different houses connected by a bridge.

Some charming, but sadly, unloved animal statues call this park home.

Frida Kahlo's childhood home, now a museum of her life and works.

66,000 pieces of art, donated by one of the world's richest men.

The collection of intricate sculptures includes one carved from a mammoth's tusk

Part bookstore, part café, and part forest.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

These millennia-old murals once covered the walls of residential complexes across the ancient city.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

Hidden among the trees at the Rangeley Lakes Trails Center are more than 20 gnomes in small wooden houses.

Restaurant in a 1741 farmhouse that touts the story of its haunting on its menus.