An incredible garden taking over the interior of a massive sinkhole.

A simple tribute to the migrant workers who landed here before walking hundreds of miles to Victoria's gold mines.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Twisted buildings adorn the banks of the Rhine river.

This futuristic German television spire is actually the world's largest digital clock.

The shortest in the world, this landing strip stretches a mere 1,312 feet before steep cliffs on either end plunge into the Caribbean.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

A little sculpture with a large wardrobe.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Climb inside an iron crystal magnified 165 billion times its normal size.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

30 years worth of pressed-tin, bakalite, and characters both loved and forgotten.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Singapore's landscaping project is home to 18 incredible Supertrees.

Once the private home of China’s most legendary tycoon, getting inside this stunning mansion no longer requires an elite pedigree or acts of daring.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Extravagant mosque honors modern Islam.

More than 200 statues filled with cryptic symbols give this park spot an aura of horror vacui fantasy.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

Monument to a brutal, ineffectual US bombing campaign and a sobering reminder of the human cost of the Vietnam War.

The largest shot tower in Australia is a unique reminder of industrial ammunitions history.

Three-story concrete ram with a permanent gift shop.

One of the first big sculptures anywhere in Australia.