The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

This tribute to the 16th-century composer is now an unusual shrine to Michael Jackson.

A serious museum dedicated to two German comedians.

King Ludwig I's collection of beautiful women.

This riverside restaurant has been serving customers since 1146.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

Handsomely crafted representations of our round planet.

One of the best collections of wax anatomical models in the world.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

A spherical "micro-nation" in the heart of Vienna.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

This unassuming oasis elevated just above the busy streets of Jerusalem offers one of the best views of the Old City.

Tel Aviv's popular neighborhood went though endless waves of transformation.

A stunning mosque owes its design to an Ottoman ruler nicknamed "the Butcher."

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

This historic rec center in the heart of Israel is a bastion of peace and togetherness.

A striking series of six bridges connect islands in Indonesia.

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

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

The only quarter of the Old City not dedicated to a major world religion.

A modern-day cabinet of curiosities housed in a 300-year-old inn.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.