A miniature city, once ruled by the Queen of the Netherlands.

The largest 19th century panorama in the world still in-situ.

This rare basalt crater lake is used to study the Moon and Mars.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

This peaceful Sikh gurudwara serves around 50,000 free meals every day within its gilded walls.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

An extraordinary "City of Caves" carved from solid stone.

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

Rock-cut cave complex filled with ancient Buddhist artwork.

The world's second-largest sundial, made entirely out of stone.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

A blooming house of worship for the masses.

Made by a man on a worldwide sanitation crusade.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

It houses the remains of a 17th-century version of the Titanic.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

A giant repository of accidentally discovered cave paintings up to 30,000 years old.

Caves full of Buddhist statues, incredible rock formations and a deserted lagoon.

A precariously perched golden rock defies gravity and brings pilgrims from across Myanmar.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

These enlarged egg sculptures represent the native birds of eastern Iceland.