A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

Fossilized sea bottom and lime quarry.

Resonating tubes make music from highway overpass.

Over fifty whirling pools left by the glacial age.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Bug-devouring flora are the stars of a special wing of the glass conservatory.

Gorgeous purple flowers drape from the world's largest blossoming plant.

Hiding amid the largest camellia collection in the country lies a charming children's maze, donated by a secret admirer.

A hotel and restaurant serving as the mecca of kitsch.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

A market built atop boats is one of the few floating holiday markets in Europe.

Memorial to one of the most fatal fires in both circus and U.S. history.

A lasting remnant of The Blitz.

The remains of the oldest bone-headed dinosaur in North America.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.

Canyon walls shrouded in ferns.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

Taos Pueblo recipes, foraged ingredients, and outdoor ovens define the menu at this eatery.