This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

The world's largest frame offers spectacular views of the city's past and present.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This indoor ski resort has a mountain contained inside a mall.

One of the largest sand dunes in the world is nicknamed the "Scary Mountain" due to its steep slope and sharp incline.

These gnarly desert trees produce the prized aromatic resin traded along the ancient incense trail.

An imposing Omani fortress surrounded by date palm trees.

This beautifully restored fortification kept the city safe for centuries.

Traditional architecture and ancient irrigation systems are on display in this gorgeous mountain village.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

This library and museum is dedicated to the life and literature of the Indianapolis native author.

This stately clubhouse has showcased German-American culture for over a century.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

Nature and art meet in this curvy creation

The world's longest known cave system.

One Confederate statue that accurately reflects the ugliness of its subject.

Follow the steps, and this roadside artwork will teach you how to dance.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

A natural history museum with an extensive collection of bird dioramas.