A marvel of Byzantine engineering under the streets of Istanbul.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Described as "the world's most blinging pool."

Enormous pendulum helps keep Taiwan's tallest building from swaying.

Originating in the 16th century this fort is far more than a military structure.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

The Shinsegae Department Store is the largest of its kind in the whole world.

A symbol of hope, survival, and national character, especially after it rose phoenix like from the flames.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Singapore's landscaping project is home to 18 incredible Supertrees.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

Malaysia's floating mosque.

A battle between nature and architecture in the Cambodian jungle.

A peculiar museum that includes many drunken tales, a drunk driving simulator, and much more.

It houses the remains of a 17th-century version of the Titanic.

A symbol for the opposition to nuclear power around the world.

One of the world’s largest suspended aquariums, located in Dubai Mall.

Mosaics, storks, and brothels—this ancient city has it all.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.