A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

An architect's childhood fantasy treehouse made real.

Enormous lake at the bottom of a unique cave system.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

Wonderland replication in progress by one persistent man.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

Stunning Roman aqueduct used for 1900 years and still standing.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

This semi-secret storybook hedge maze is also the oldest garden in the city.

This cemetery features modernist statues as strange as its name.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

Village situated on a narrow volcanic escarpment.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

At 8,000 feet, the world's highest tea estate draws visitors for both its products and its panoramic views.

A former bastion of Rajput chivalry, this massive hill fort is the site of legend and tragedy.

A complex of six forts embedded in the Rajasthan hills.

A single tree's 2,800 aerial roots give the appearance of a complete forest.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

The remains of what was, not so long ago, the world's largest city.