Stunning wetlands ablaze with pink lotus flowers.

A limestone wonderland of water and subterranean secrets.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

A forest of phallic offerings found in a quiet corner of a hotel car park.

A white Buddhist temple with a golden restroom.

Thousands of bats stream out of caves every night on the edge on Thailand's second largest park.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

Suburban observatory was personal lab of the father of modern astrophysics.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

This hands-on math museum believes in turning concepts into constructs.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

Ancient burial grounds of the wealthy.

An Amazonian hotel is the ultimate treehouse and provides stilt based accommodation.

Sweden's "good old days" painstakingly re-created in a model village.

Large Hadron Collider and the Birthplace of World Wide Web.

Caves famous for the dragon-slaying saint who lived there.

Swiss vineyards in a UNESCO heritage site.

Spiral alpine structure provides an alternative experience of viewing the Matterhorn.

Abbey built on the ruins of Roman catacombs.

World's largest permanent maze made of 18,000 conifers.

A historic observatory precariously perched at the "Top of Europe."

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.