RollerCoaster Tycoon 3

This set contains rustic walls, 1h roofs, wooden floors, marble columns, wooden railings, shutters, bedrock walls, signs, windows, and a lot more.

10 Inversion Intamin CT by Ciniapaes. Originally posted on RealTycoon3.com

Boomerang CT by Cinipaes. Originally posted on RealTycoon3.com

Arrow Corkscrew CT by Cinipaes. Originally posted on RealTycoon3.com

Apocalypse CT by Cinipaes. Originally posted on RealTycoon3.com

Banshee CT by Cinipaes. Originally posted on RealTycoon3.com

Batman: The Ride CT by Cinipaes. Originally posted on RealTycoon 3

This set contains generic billboards in three styles... Single-sided, double-sided, and wooden backed.

This set features updated roofs with better textures and thicker beams and posts.
 

This set contains mostly interior pieces, decor, and furnishings.
 

Updated Alpine Village objects includes stucco walls, windows, doors, path covers, chimneys, roofs, shutters, and curtains.

This is the third set made for Alpine Village in Wonder World. It contains more stucco walls, roofs, beams, posts, doors, windows, chimneys, rock walls, dormer windows, signs, plus flags, castle pieces, corner stones, window flower boxes and more.

This is the second set created for Alpine Village in Wonder World. It contains more stucco walls, windows, roofs, beams and posts, plus rock walls, signs, dormer windows, and more.

This is the first Alpine Village set created for the land in Wonder World. It contains stucco walls, roofs, windows, beams, posts, shutters, chimneys, and lots more.

Author: Rctk1
This is taken from RealTycoon3.com's old website.  It is pretty realistic and features an in-depth layout of the B&M Invert, Afterburn at Carowinds.

This is a custom pyro pack I made for a show that was never finished. Should be placed in the fireworks folder inside of your rct3 installation. Includes a readme file explaining the effect codes of each name.

Set containing terrain blocks in different sizes and forms to make landscaping easier or possible at places where normal landscaping is not possible because of attractions or such. There are many 1/4 tile pieces. The set is divided in 2 parts: 1h height and 2h height. 236 pieces. Created by errt.

Includes characters from Disney's Pirates of the Caribbean attraction. Plus: anchor, animals, birds, boat, boxes, cage, chairs, chest, firearms and artillery, flag, fruit and vegetables, hose, paintings, pirate, sails and masts, ships, skeleton, skull, steering wheel. 31 pieces. Created by Lulujarre.

A versatile set containing: arches, beams, borders, columns, curved doors, curved walls, diagonal walls, doors, sloped walls, walls, and windows. The set is divided into 2 parts: Brick Walls and Stucco Walls. 244 pieces. Created by The_Cook.

This is a set of Rct3 static structures and some pre-imaged billboards. Created by Gravquian.

A set to be used to recreate the Space Mountains queues. Created by KrakatoaCoo.

Swing Ship "Schneider's Schiffschaukel" custom scenery object animated. Created by Coastergirl.

A set of moons in different sizes. Each of them comes in full and crescent variations. Some are white, some are red. As you can see from the image, even the smallish moons are quite large, while the big moons are giant-sized. 12 pieces. Created by Zephon.

A set of recolorable wooden catwalks in flat, 1H, and 2H slopes. 8 pieces. Created by Scfjunkie.

A large and versatile set with eroded rock textures. Great for: natural arches, cliffs, geyser bases, irregular columns, and rocky terrain. The set is divided into 2 parts: The original set, which has 138 ocher-colored pieces and dark-orange pieces. And the Update 1 set, which has 69 re-colorable pieces. Created by ParkManager.