Nature is leading a successful mutiny on this century-old freighter.

Once the path of a railway tunnel, now home to thousands of glowing insects.

Australian Lake set aglow by Noctiluca Scintillans.

An Australian lake whose pink hue defies scientific explanation.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

Moss and stone turn this waterfall into an otherworldly liquid veil.

The world's oldest bookshop still in operation.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

An underground city of salt.

World's strongest whirlpool.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

Walk behind a 50-meter-high waterfall.

An intricately carved Viking church overlooks a glistening fjord.

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

Home to three historic ships from the age of Vikings.

A stunning silver lining to global warming's gloomy cloud.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.