A marvel of Byzantine engineering under the streets of Istanbul.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

A century-old tradition has culminated in a small but singular collection of feline effigies.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A giant Australian fruit and tropical farm.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Walk in the footsteps of the gods and straddle two tectonic plates.

Medicinal spa created with the discharge from a geothermal energy plant.

An encyclopedic collection of mammal penises.

A perfect turquoise lake colored with glacier dust.

New Zealand's epic shrine to all things puzzling.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

Largest Kauri tree in New Zealand.

Handcrafted thermal spa washes away each night with the tide.

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

Tubing through a cave lit with glowworms is a magical underground experience.

Read a book next to a Midtown waterfall.