Landscape of bizarrely shaped desert mountains and innumerable rock carvings.

An endless sea of white conical domes.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

Ozymandias’ time-keeping temple.

An ancient city exhumed from the depths of the ocean.

A British general, a suggestive tree, a map of paradise.

Over two-thirds of the world's population of giant tortoises live among this coral formation.

A valley of unique erosion patterns lends to a view like nothing on Earth.

What was once a unique system of urban elevators is turning into a mechanical ruin.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

The largest stone moai on Rapa Nui.

Abandoned bull fighting ring, slowly falling apart in Uruguay.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

This stunning mass of ice spans 121 square miles and is still growing.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

The haunting peak of an old church is all that remains of a drowned Brazilian city.

The bookstore with bookshelves built into unlikely places.

These termites have an large and deadly abode—impressive by day, dazzling by night.

Beautiful public park off the beaten path and away from tourists.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.