This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

The ghost town that ended up on Ebay.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

Built as a schoolhouse in 1914, this Mission-style building has also served as a dancehall, a library, an Army canteen, and now a cultural museum.

Tucked away in the forests of North Florida resides a 19th-century lighthouse.

Every winter, this former planetarium is transformed into a massive, brightly-lit Christmas ornament.

This monument pays homage to a classic Dutch tune.

The largest collection of the iconic wooden shoe in the world.

This elaborate towering structure was once famed for its revolutionary height.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The first American department store, and home to the largest operating musical instrument in the world.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

Nature took her revenge on the "Wickedest City in the World."

One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.

The first woman to become a member of the parliament of Iceland.

A monument dedicated to the civil uprisings that took place during the Pots and Pans Revolution.

Along this wire fence, travelers have been leaving a particular memento since 2012.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

This five-foot-tall bronze bird is a memorial to a species that was hunted out of existence.

Pick up this rock and become an instant legend.

This former farm In northern Iceland is now a museum, where visitors can tour beautifully-preserved turf houses.

This excellent museum recreates the boom days of the herring rush in the "Atlantic Klondike."