A shiny sculpture celebrating the mighty mollusk.

Water-themed sculptures guard this unusually square structure.

Scotland still bears an enormous scar of its Roman past.

This bridge was constructed from the remains of the first Ferris wheel.

Egyptian treasure trove of fossils documenting the whale's transition from land mammal to sea creature.

The recreated ruins of a house designed to memorialize a World War I shelling on the town.

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

One of the most important Celtic-Roman archaeological sites in Spain.

These giant sculptures are supported by a bizarre menagerie of feet.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

The remnants of this unusual bridge await an uncertain fate.

A memorial to a giant seabird that was hunted to extinction.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

A rather grand, but tiny, folly on the banks of the River Wear associated with a Polish count.

A hidden medieval crypt where a famous legend says the devil used to teach black magic.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.

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

Seventy-five miles of limestone caves host more than a million bottles of wine beneath a sleepy Moldovan town.

An out-of-place grove of sequoias thrives in northern Spain.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

The walls of these four caverns are filled with art that dates back to the earliest human presence in Europe.

A medieval fresco which reminds visitors that death will come for us all.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.