If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

The ruins of an ancient Mayan city, beautifully preserved and only accessible by boat.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

This effigy of Peter the Great is greatly disproportionate.

Rare documents, old instruments, and gruesome specimens showcase the history of military medicine.

Europe's highest peak is a key pillar of the Seven Summits mountaineering challenge.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

An eerie reminder to the horrors of World War II.

This village is home to the largest existing settlement of the Ainu, the Indigenous people of Japan.

These wondrously illuminated caverns extend under the mountains of the Fukushima Prefecture.

Narrow passes cut out of mountains surround the medieval capital of Japan.

The statue's head is one of the few fragments of the original Urakami Cathedral to survive the atomic bomb.

Hidden by the roadside in the Iya Valley, this gem brings together folk monsters and the region's unique geography.

Approximately 300 million years ago, a massive coral reef existed in what is now the largest limestone cave in Japan.

This ancient burial site was once thought to be the home of a race distinctive to Ainu folklore.

Weighing nearly 7 tons, this massive sculpture was carved out of 500-year-old wood and decorated with thousands of jewels.