This extremely remote border crossing was closed to prevent smuggling and looting.

Bombed and burned, this monument represents the often controversial ties between Vietnam and Cambodia.

This unusual rock formation looks like an apple that has been neatly sliced in half.

This beautiful train graveyard is one of the largest collections of steam locomotives in the Mediterranean and Europe.

The highest tides in the world come in and out here twice a day, allowing you to essentially walk along the ocean floor.

This historic little railroad runs through some of the most beautiful scenery in Germany.

History, geography, and shamanism meet in this eye-catching monument to the greatness of three empires.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

An unusual monument to a gentle giant who became a Kyrgyz hero.

This nugget of paradise earned its name for obvious reasons.

Thailand's distressed elephants find peace at this Chiang Mai sanctuary.

England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

These charming mailboxes became social media stars after a typhoon failed to topple them.

The evocative ruins of a 1,000-year-old hill fort lie within a popular tiger reserve.

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

An ancient octagonal weather station named for the eight Greek gods of wind.

A creepy, deserted mock Arabian village can be found in the middle of the Qatari desert.

Exploring the wilder, more passionate sibling of Erg Chebbi feels like discovering a secret sun-kissed planet from another galaxy.

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

New Zealand's only running funicular railway.

The world's widest single drop waterfall, and the two men who legend says went over its edge in a boat.