While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

Dive bar built out of the remains of a whaling ship.

Amateur taxidermy museum known for its large collection of white squirrels.

An experimental, automotive replica of Stonehenge.

An ancient iron pillar in Delhi that seems to be rustproof.

A marvel of Byzantine engineering under the streets of Istanbul.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

Bouncing, delightful, mechanical art at the MIT Museum.

Museum dedicated to awful artwork.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Bridge that died in war and was resurected.

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

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Ruins of the Crusaders' headquarters.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.