The competition: breathe deeply as long as you can.

Set sail on a small scale.

This 19th-century fountain's namesake animal isn't what you think it is.

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

Giant topiary dog once played a role in a terrorist bomb plot.

A medieval village holds a very modern hotel.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

An 18th-century religious argument etched into stone.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

An idyllic mineral hot springs facility with a more-than checkered past.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

Granny Smiths and Fujis can both be traced back to Kazakhstan, where apples still grow wild.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

The unbelievably opulent home built for an infamous newspaperman.

An alley covered with 20 years of bubble gum.

A hotel and restaurant serving as the mecca of kitsch.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

Victims of the Webster Massacre are buried here in a mass grave.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

A home designed to be on the cutting edge of comfortable, low-cost living.