Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Monasteries on rock pillars, once accessible only by frayed ropes.

A massive underwater sinkhole made famous by Jacques Cousteau.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Canyon walls shrouded in ferns.

A battle between nature and architecture in the Cambodian jungle.

A 20-meter (65-foot) robot towers over Tokyo Bay.

A beautiful but toxic fountain of mercury.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

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

A fifth-century temple improbably built into the side of a cliff.

400-year-old garden, restored to beauty.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

Order “Proletariat’s Cutlet” at this communist-themed restaurant allegedly once visited by Lenin.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

Roman ruins top white travertine terraces formed by ancient hot springs.

In paradise, feral pigs have claimed an island all to themselves.

A marvel of Byzantine engineering under the streets of Istanbul.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

The first park built over a freeway is a brutalist masterwork.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.