This museum preserves over-the-top masterpieces that once qualified artisans for membership into a medieval guild.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

One-of-a-kind museum inside the first Boeing 747-400 ever made.

This Art Deco airport was once deemed “the air hub of the Americas.”

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

A serene temple with stunning stained glass hides in downtown Dallas.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

These legendary stone steps were once used to haul coffins up the rockface.

The vertical-axis windmills of ancient Persia have been grinding flour for 1,000 years and counting.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

The world-record holder for the longest bridge stretching continuously over water.

The first and only museum dedicated to stained glass and horology opened outside of Chicago in 2017.

The world's largest rotating world.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

An enormous, inside-out glass globe built in 1935.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

This historic little railroad runs through some of the most beautiful scenery in Germany.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Modern commuters still pass through this 2,000-year-old Roman archway.

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.