Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

An important Mayan religious and trading center dating back to 200 BC.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

A 300-kilogram egg sculpture that embodied a neighborhood revival.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

This micro-nation may be some sort of prank, but its constitution sure seems official.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A museum dedicated to the tragedy of Bloody Sunday.

These murals stand as reminders to the troubled history of this Northern Ireland city.

It was once nicknamed "the most bombed hotel in Europe."

Step into Narnia at this small park featuring statues from "The Lion, the Witch, and the Wardrobe."

These barriers stand as stark reminders of Northern Ireland's troubled past.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

A museum marks and documents the site of the Titanic's launch.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A whimsical bridge adorned with decorative dragons.

340-foot statue built to honour the Heroes of the Soviet Union.

The metal leaves on this tree are engraved with the names of Holocaust victims.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.