The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

You can walk up Thailand’s naturally non-slip waterfall.

The busy transport hub is home to the tallest airport slide in the world.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

A sprawling museum located on the former site of the Orphan Girl Mine.

Once where royalty entertained guests, this opulent table is now one of the longest in the world.

This Gothic church houses ornate royal tombs and a magnificent gilded altarpiece.

The former home of a disgraced local priest now hosts a mysterious secret supper club.

This baroque wonder is filled with a trove of artistic treasures.

Ride a boat through this magnificent underground world, which now doubles as a theater.

Hidden deep within a Filipino jungle is an incredible waterfall that plunges into a dazzling blue-green pool.

Enormous sandstone towers loom within a Czech forest.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

More than 450 years ago, an Italian nun became the first woman to paint the iconic subject.

This 12th-century house is one of the oldest continuously inhabited houses in Britain.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

You can soak in three relaxing pools filled daily by the tide.

A gorgeous gilded tower houses what may be the world's largest collection of gin.

The fifth-longest natural arch in the world, and the longest outside China.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A "time traveler's" vision of human history stretches throughout Mexico City's Copilco metro station.

The world's largest bamboo labyrinth is a living demonstration of the plant’s immense potential.

The building is a gigantic piece of art inspired by the shape of a desert rose.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.