I've only got a few, and some are natural, some man-made.
The Stormchaser Coast - The most beautiful stretch of coast in the world, with hundreds of miles of 300-ft. cliffs carved by nearly endless storms. During thunderstorms, the air magic here is so strong that anyone can leap from the cliffs and fly for an hour or more.
Mount Sanselglas - A massive mountain of crystal. It reflects light blindingly during the day, but beautifully at night. On a full moon, the surrounding countryside is bathed in a gleam that evokes memories of ages past.
The Seven Bridges of Seaquen - Where once an isthmus connected two continents, a city of mages three thousand years ago reshaped the earth to create a massive channel and seven mile-long bridges that span it. Around this channel grew the city of Seaquen, and today each bridge has its own unique character and charm.
The Treetop City of Cartal'yardon - An Elvish city built into and atop the trees of the Vaneljesti Forest. Hundreds of thousands of Elves live free from the ground, here where branches become roads.
The Library at Aeriechellaak - The Aechan are a winged avian race, and their greatest city, Aeriechellaak, is built atop numerous mesas and plateaus. Due to their unique interest in collecting random things, many Aechan possess libraries of exotic books. This massive resource of knowledge is spread across an entire city, with a little bit in every household. There are libraries of all sorts of specialties, like the Library of Exotic Creatures, the Library of Fighting Styles, and the Library of Frozen Foods. Thankfully, visitors can find their way thanks to the Library of Libraries, which keeps records of all books in the city. Of course, it is very hard to navigate the city without wings.
The Husks of the Kequalak Wastes - Thousands of ancient metal pillars are arrayed in a gargantuan ring, over a thousand miles across in the nation of Kequalak. Made of a steel that does not age, these hollow pillars may once have held something important, but by now they all have been torn open and looted, leaving countless metal husks, half-buried in the dirt of a dying land.
The Long Road - No one has ever traveled the Long Road in modern times, but in ages past it was said to lead to the tombs of eight immortal emperors, providing unique wisdom at each tomb, to encourage none to attempt to conquer the world again. Of the known tombs there are such wonders as the Temple of Echoed Souls where visitors can relive their own memories, and The Dungeon of Pain, a truly masterful collection of traps, curses, and antimagic that is said to keep trapped the cruel Minister of Pain. It is said that any who find the end of the road and pass its tests of wisdom can gain immortality.