This legendary city has been a tourist attraction for centuries.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

A deadly ancient portal to the underworld.

The palace of the King of Kings, burned by Alexander the Great.

The quintessential Japanese rock garden has existed for more than 500 years.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The largest greenhouse in the world is home to over one million types of plants.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The subtle science of a master molecular gastronomist.

A beautiful 62-acre Catholic shrine and botanical garden.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

The final resting place for the remains of 143 Habsburg royalty.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Abandoned power station once home to a squatter community, now being developed into an arts center.

An unrealized dream to wirelessly electrify the entire Earth.

World's largest cave was only discovered in 1991, and now offers tours to the public.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.